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Myles William O'Brien

Professeur, Faculté de médecine et des sciences de la santé
FMSS Département de médecine

Présentation

Sujet de recherche

Aging Process, Community Health / Public Health, Lifestyle Determinants and Health, Cardiovascular System

Disciplines de recherche

Kinesiology, Physiology, Geriatrics-Gerontology

Mots-clés

Accelerometry, Exercise Physiology, Exercise Prescription, Frailty, Inclinometry, Sedentary Physiology, Vascular Aging

Intérêts de recherche

Mobility and Movement Interventions in Hospital and Long-Term Care.Physical (In)activity, Endothelial Function, and the Neural Regulation of Vascular FunctionDevelopment and Validity of Physical Activity Monitors and Metrics.Integration of Physical Activity and Exercise in Healthcare by Primary Care Providers and Qualified Exercise Professionals.The Independent Physiological Impacts of Aerobic Fitness, Physical Activity, and Sedentary Postures.

Recherche clinique

Langues parlées et écrites

Anglais, Français

Diplômes

(2022). The Impact of Cardiorespiratory Fitness on Peripheral Vascular Function in Older Adults (Doctorate, Doctor of Philosophy in Health). Dalhousie University.

(2018). The Effects of Short-term High-Intensity Interval, Moderate-Intensity Continuous and Resistance Training on Cardiovascular Health in Older Adults (Master's Thesis, Master of Science in Kinesiology). Dalhousie University.

(2016). Implementation and Perceived Effectiveness of the Exercise is Medicine Canada Exercise Prescription Resources Among Health Care Providers Across Canada (Bachelor's Honours, Bachelor of Kinesiology Honours). Acadia University.

Titres de compétence

(2027) Department of Medicine - Adjunct Scholar. Dalhousie University.

(2025) School of Health and Human Performance - Adjunct Scholar. Dalhousie University.

CSEP – High Performance Specialist.

CSEP – Clinical Exercise Physiologist.

Prix et distinctions

  • (2023) CIHR Post-Doctoral Fellowship (Ended Early for Professor Position). Canadian Institutes of Health Research. (Distinction).
  • (2023) Dalhousie University Internal Medicine Research Foundation Award (Ended Early for Professor Position). Dalhousie University. (Distinction).
  • (2022) Fredrick Banting and Charles Best CIHR Doctoral Award. Canadian Institutes of Health Research. (Distinction).
  • (2022) Killam PreDoctoral Scholarship. Dalhousie University. (Distinction).
  • (2019) BrightRed Mission Award. Heart and Stroke Foundation of Canada. (Distinction).
  • (2019) Mitacs Accelerate Internship. MITACS. (Distinction).
  • CIHR Institute of Aging Fellowship Prize of Excellence in Research on Aging. Canadian Institutes of Health Research. (Honor).
  • University Scholar. Acadia University. (Prize / Award).

Financement

  • (Awarded). Co-applicant. Investigations sur les Mécanismes et Prédicteurs de liens entre Activité physique, autres Comportements et Trajectoires de Santé (IMPACTS): Décrire, Découvrir et Déployer (PI: Dr. Said Mekari). Research New Brunswick. Equipment Fund. 150 000 $. (2025-2028)
  • (Awarded). Principal Applicant. Preventing Frailty in Hospital Through a Kinesiologist-led Patient Mobilization Initiative. Canadian Society for Exercise Physiology (Gloucester, ON). CSEP Seed Grant. 5 000 $. (2025-2027)
  • (Awarded). Principal Investigator. Establishing Mobile Ageing Assessments in New Brunswick’s Long-Term Care Residents. Research New Brunswick. Research Related Support Fund. 42 500 $. (2024-2026)
  • (Awarded). Principal Investigator. Impact of In-Hospital Mobilization on Male and Female Cardiac Patients. Heart & Stroke New Brunswick. Cardiovascular Research Endowment Fund. 40 000 $. (2024-2026)
  • (Awarded). Principal Applicant. NBIF Talent Recruitment Fund. New Brunswick Innovation Fund. NBIF Talent Recruitment Fund. 55 000 $. (2024-2026)
  • (Awarded). Principal Applicant. Université de Sherbrooke: Research Centre on Aging. Université de Sherbrooke: Research Centre on Aging. Research Support. 25 000 $. (2024-2026)
  • Grant. (Awarded). Principal Applicant. Managing and AVOIDing Frailty and Adverse Musculoskeletal Health in the Canadian Longitudinal Study on Aging.. Canadian Institutes of Health Research (CIHR). CIHR Catalyst Grant. 70 000 $. (2025-2026)
  • (Awarded). Principal Investigator. Preventing Frailty in Hospital Through Mobilizing Patients: A Pilot RCT. Vitalité Health Network. DUO Grant. 25 000 $. (2024-2026)
  • (Awarded). Principal Investigator. Assistant Professor Start-Up Funds. Université de Sherbrooke & Centre de Formation Médicale du Nouveau-Brunswick. Research Support. 50 000 $. (2024-2026)
  • (Awarded). Co-applicant. Understanding the Needs of Allied Health Professionals to Helping Patients AVOID & Manage Frailty (PI: Dr. Olga Theou, Dalhousie University). Shoppers Drug Mart. Shopper Drug Mart Research Grant. 25 000 $. (2024-2025)
  • (Completed). Principal Investigator. Are There Less Bad Ways to Sit in Hospital and in Long-Term Care?. Nova Scotia Health Authority. Nova Scotia Health Research Fund. 10 000 $. (2024-2025)
  • (Completed). Co-investigator. The Personalized Approach for Healthy Aging (PAHA) program (PI: Dr. Olga Theou; Dalhousie University). Research Nova Scotia. New Health Investigator. 100 000 $. (2022-2024)
  • (Completed). Co-investigator. Hosting an Exercise is Medicine Canada Think Tank to Create Research Priorities (PI: Dr. Jonathon Fowles; Acadia University). Canadian Institutes of Health Research (CIHR). CIHR Planning and Dissemination Grant. 25 000 $. (2023-2024)
  • (Completed). Principal Investigator. Implementation the Development of the Stand Up for Your Health Initiative. Dalhousie University. Dalhousie Workplace Wellness Grant. 2 000 $. (2023-2024)

Publications

Articles de revue

  • Tremblay R, Shivgulam ME, Halliwell C, O’Brien MW. (2025). Invited Commentary: The Right Treatment for the Right Patient: Utility of Exergaming & Medical Yoga for Heart Failure Patients. European Journal of Cardiovascular Nursing 1 1.
  • Ahmadi S, Bélanger M, O’Brien MW, Registe PPW, Dupuy O, Mekari S. (2025). Original Article: Acute effects of Aerobic Exercise Modalities on Executive Function in Healthy Older Adults. Scientific Reports 15 6749. (Published).
  • Halliwell C, O’Brien MW, Moyer R. (2025). Original Research: Moderate-to-Vigorous Physical Activity Independent of Stationary Time Is Associated with Better Functional Outcomes Over Four-Years in Individuals with or at Risk for Knee Osteoarthritis. Musculoskeletal Care 1 1.
  • Rayner SE, Waghorn J, MacDonald EE, Shivgulam ME, Pellerine LP, O’Brien MW. (2025). Review Article: Accelerometer Determined Free-Living Sit-to-Stand Velocity: A Scoping Review of Methodological Developments, Participant-Level Factors, and Link to Health. Journal for the Measurement of Physical Behaviour 1 1.
  • Shivgulam ME, Tiemstra AR, Hebert BJ, Fowles JR, O’Brien MW, Nagpal TS. (2025). Review Article: How are Exercise Professionals Described within the Academic Literature? A Narrative Review. Applied Physiology, Nutrition, and Metabolism 1 1.
  • Nagpal TS, Randhawa H, Pallister R, Fowles JR, O’Brien MW. (2024). Brief Report: What do Canadian universities suggest on their webpages as future career and educational pathways following completion of a kinesiology or exercise science undergraduate program?. Applied Physiology, Nutrition, and Metabolism 1 1.
  • Shivgulam ME*, MacDonald EE*, Waghorn J*, O'Brien MW. (2024). Commentary: Standing Still or Standing Out: Distinguishing Passive and Active Standing is a Step in the Right Direction. Journal for the Measurement of Physical Behaviour 1 1. (In Press).
  • Usselman C, Lindsey M, Robinson A, Habecker B, Taylor C, Merryman WD, Kimmerly D, Bender J, Regensteiner J, Moreau K, Pilote L, Wenner M, O'Brien M, Yarovinsky T, Stachenfeld N, Charkoudian N, Denfeld Q, Moreira-Bouchard J, Pyle W, DeLeon-Pennell K. (2024). Invited Review: Guidelines on the Use of Sex and Gender in Cardiovascular Research. American Journal of Physiology – Heart & Circulatory Physiology 326 H238-H255. (Published).
  • Waghorn J*, Liu H*, Rayner SE*, Kimmerly DS, O'Brien MW. (2024). Original Research: A Single Bout of Prolonged Sitting Augments Very Short-Term Blood Pressure Variability. American Journal of Hypertension 1 hpae055. (Published).
  • MacDonald EE*, Pellerine LP*, Miller K, Frayne RJ, O’Brien MW. *Co-First Authors. (2024). Original Research: Absolute Moderate-to-Vigorous Physical Activity is Associated with Better Health Related Quality of Life in Outpatients with Acquired Brain Injuries. Frontiers in Rehabilitation 1 1. (In Press).
  • Pellerine LP*, Courish MK*, Petterson JL*, Shivgulam ME*, Johansson PJ, Hettiarachchi P, Kimmerly DS, O’Brien MW. *Co-First Authors. (2024). Original Research: Assessing the criterion validity of the activPAL CREA v1.3 algorithm and ActiPASS 2023.12 software for detecting steps during a progressive treadmill-based laboratory protocol. Journal of Sports Science 1 1. (In Press).
  • Ahmadi S, Quirion I, Faivre P, Registe PPW, O'Brien MW, Bray NW, Dupuy O, Sénéchal M, Bélanger M, Mekari S. (2024). Original Research: Association Between Physical Fitness and Executive Functions in Cognitively Healthy Female Older Adults: a Cross-Sectional Study. GeroScience 1 1. (In Press).
  • O’Brien MW, Bray NW, Quirion I, Ahmadi S, Faivre P, Gallant F, Gagnon C, Sénéchal M, Dupuy O, Bélanger M, Mekari S. (2024). Original Research: Association between changes in habitual stepping activity and cognition in older adults. Scientific Reports 14 8003. (Published).
  • Mayo A, O'Brien MW, Godin J, Kehler DS, Kimmerly DS, Theou O. (2024). Original Research: Can an active lifestyle offset the relationship that poor lifestyle behaviours have on frailty?. Archives of Geriatrics and Gerontology 1 1. (In Press).
  • Pellerine LP*, Miller K, Frayne RJ, O’Brien MW. (2024). Original Research: Characterizing Habitual Physical Activity and Sedentary Time in Outpatients with an Acquired Brain Injury. Sports Medicine & Health Science 1 1. (In Press).
  • Shivgulam ME*, Kimmerly DS, O’Brien MW. (2024). Original Research: Criterion-Validity of Commonly Used Sedentary Behaviour Questionnaires to Measure Total Sedentary Time in Adults. Journal for the Measurement of Physical Behaviour 7 1. (Published).
  • Wu Y*, O'Brien MW, Peddle A, Daley WS, Schwartz BD*, Kimmerly DS, Frayne RJ. Co-first authors. (2024). Original Research: Criterion Validity of Accelerometers in Determining Knee-Flexion Angles during Sitting in a Laboratory Setting. Journal for the Measurement of Physical Behaviour 7 1-7. (Published).
  • O'Brien MW*, Maxwell SP*, Moyer R, Rockwood K, Theou O. *Co-first Authors. (2024). Original Research: Development and Validation of a Frailty Index for Use in the Osteoarthritis Initiative. Age & Ageing 1 1. (In Press).
  • Rayner S*, Pellerine LP*, Wu Y*, Shivgulam ME*, Petterson JL*, Kimmerly DS, O’Brien MW. (2024). Original Research: Faster Stepping Cadence Partially Explains the Higher Metabolic Cost of Walking Among Females Versus Males. Journal of Applied Physiology 136 1238-1244. (Published).
  • O’Brien MW, Bray NW, Quirion I, Ahmadi S, Faivre P, Sénéchal M, Dupuy O, Bélanger M, Mekari S. (2024). Original Research: Frailty is Associated with Worse Executive Function and Higher Cerebral Blood Velocity in Cognitively Healthy Older Adults: A Cross-sectional Study. GeroScience 46 597-607. (Published).
  • Waghorn J, Schwartz BD, Shivgulam ME, Wu Y, Kimmerly DS, O’Brien MW. (2024). Original Research: Meeting International Muscle Strengthening Guidelines is Associated with Better Cardiovagal Baroreflex Sensitivity in Adults. Frontiers in Sport and Active Living 1 1.
  • MacDonald E*, Morrison EG, Shivgulam ME*, Pellerine LP*, Kimmerly DS, Bray NW, Mekari S, O'Brien MW. (2024). Original Research: Moderate Intensity Intermittent Lifestyle Physical Activity is Associated with Better Executive Function in Older Adults. Frontiers in Sports and Active Living 6 1393214. (Published).
  • O’Brien MW, Schwartz BD*, Petterson JL*, Courish MK*, Shivgulam ME*, Kimmerly DS. (2024). Original Research: Nadir Blood Pressure Responses to Longer Consecutive Cardiac Cycle Sequences Absent of Sympathetic Bursts are Associated with Popliteal Endothelial-Dependent Dilation. Autonomic Neuroscience 254 103193. (Published).
  • Courish MK*, O’Brien MW*, Maxwell SP, Mekari S, Kimmerly DS, Theou O. *Co-First authors. (2024). Original Research: Relationship Between Frailty and Executive Function by Age and Sex in the Canadian Longitudinal Study on Aging. GeroScience 1 1. (In Press).
  • Shivgulam ME*, O’Brien MW*, Wu Y*, Liu H*, Petterson J*, Schwartz B*, Kimmerly (*Co-First Authors). (2024). Original Research: Sitting Knee-Flexion Angle Does Not Influence Endothelial-Dependent Vasodilation in Laboratory or Free-Living Conditions. Vascular Medicine 1 1. (In Press).
  • Nardone M, Forster M, O’Brien MW, Coovadia Y, Xie S, Usselman CW, Kimmerly DS, Taylor CK, Millar PJ. (2024). Original Research: Sympathetic determinants of resting blood pressure in normotensive males and females. American Journal of Physiology - Heart & Circulatory Physiology 326 H612-H622. (Published).
  • O’Brien MW*, Mayo A*, Theou O. *Co-first Authors. (2024). Original Research: The COVID Pandemic Worsened Physical Activity Disproportionately in Frailer Adults: Canadian Longitudinal Study on Aging. Journal of Aging and Physical Activity 1 1. (In Press).
  • Shivgulam ME*, Pellerine LP*, Bray NW, Fowles JR, Furlano JA, Morava A, Nagpal TS, O’Brien MW. (2024). Original Research: The Influence of Occupation Status on Canadian University Students’ Ability to Meet The 24-Hour Movement Guidelines. Healthy Populations Journal 1 1. (In Press).
  • O’Brien MW, Theou O. (2024). Original Research: The Relation Between Frailty and Hypertension is Partially Mediated by Physical Activity Among Males and Females in the CLSA. American Journal of Physiology – Heart and Circulatory Physiology 327 H108-H117. (Published).
  • Wilson T*, Theou O, O’Brien MW. (2024). Original Research: Walk with a Future Doc program allows Canadian medical students to promote physical activity and health education in local communities. Canadian Medical Education Journal 15 116-118. (Published).
  • Shivgulam ME*, Liu H*, Kivell MJ, MacLeod JR, O’Brien MW. (2024). Review: Effectiveness of Contrast-Enhanced Duplex Ultrasound for Detecting Renal Artery Stenosis: A Systematic Review. Journal of Clinical Ultrasound 52 763-772. (Published).
  • Courish MK*, Shivgulam ME*, Petterson JL*, Pellerine LP*, Kivell MJ, O’Brien MW. (2024). Review Article: A Systematic Review of Educational Interventions on Physicians’ Physical Activity Counselling and Exercise Prescription Practices. Translational Journal of the ACSM 9 1-7. (Published).
  • MacLeod JR, Kivell MJ, Shivgulam ME*, Liu H*, O'Brien MW. (2024). Review Article: Accuracy of Duplex Ultrasound for Detecting Renal Artery Stenosis: A Systematic Review. Journal for Vascular Ultrasound 48 15-27. (Published).
  • Inkpen SJL*, Liu H*, Rayner S*, Shields E, Godin J, O’Brien MW. *Co-first Authors. (2024). Review Article: Exercise Referral Schemes Increase Patients’ Cardiorespiratory Endurance: A Systematic Review and Meta-Analysis. Preventative Medicine Reports 1 1. (In Press).
  • Schwartz BD, Liu H, MacDonald EE, Mekari S, O'Brien MW. (2024). Review Article: Impact of Physical Activity and Exercise Training on Health-Related Quality of Life in Older Adults: An Umbrella Review. GeroScience 1 1.
  • O’Brien MW, Shivgulam ME*, Huerta-Domínguez H, Liu H*, Waghorn J*, Courish M*, Tovar-Diaz J. (2024). Review Article: Impact of Sedentary Behaviours on Blood Pressure and Cardiovascular Disease: An Umbrella Review of Systematic Reviews and Meta-Analyses. Sports Medicine 1 1. (In Press).
  • O’Brien MW, Shivgulam ME, Liu H, Courish MK, Wu Y, Fowles JR, Nagpal TS. (2024). Review Article: The Effectiveness of Exercise Referral Schemes on Patient Health & their Cost: An Umbrella Review. Applied Physiology, Nutrition, and Metabolism 1 1.
  • Shivgulam ME*, Petterson JL*, Pellerine LP*, Kivell MJ, Wilson T*, Theou O, O’Brien MW. (2024). Review Article: The Impact of Education on the Physical Activity Counselling and Exercise Prescription of Medical Trainees: A Systematic Review of Interventional Studies. Canadian Medical Education Journal 1 1. (In Press).
  • Voss LM*, O’Brien MW*, Furlano JA, Wong MYS, Bray NW, Fowles JR, Nagpal TS. *Co-First Authors. (2023). Commentary: Leveraging Exercise is Medicine - On Campus Programs to Promote Activity to Equity-Deserving Groups. Healthy Populations Journal 3 14-21. (Published).
  • O’Brien MW*, Wong MYS*, Sui W, Voss ML, Bray NW, Turnbull CN, Nagpal TS, Fowles JR. *Co-first authors. (2023). Commentary: The Importance of Collaboration Between Medical and Exercise Professionals in Addressing Patient Physical Inactivity. Applied Physiology, Nutrition, and Metabolism 48 88-90. (Published).
  • O'Brien MW, Shivgulam ME*. (2023). Invited Review: Mechanistic, Participant, & Movement-Related Factors That Contribute to Low-Flow Mediated Constriction. European Journal of Applied Physiology 123 (12), 2687-2697. (Published).
  • Liu H*, O'Brien MW, Wu Y*, Bustamante CM, Kimmerly DS. (2023). Original Research: An Acute Bout of Prolonged Sitting Blunts Popliteal Endothelium-Independent Dilation in Young, Healthy Adults. Journal of Applied Physiology 134 521-528. (Published).
  • Shivgulam ME*, O’Brien MW. (2023). Original Research: Applying Average-Real Variability to Quantifying Day-Day Physical Activity and Sedentary Postures Variability: A Comparison with Standard Deviation. Journal for Measurement for Physical Behaviour` 6 (3), 233-241. (Published).
  • Schwartz BD*, Pellerine LP*, Bray NW, Fowles JR, Furlano JA, Morava A, Nagpal TS, O’Brien MW. (2023). Original Research: Binge Drinking and Smoking are Associated with Worse Academic Performance in Canadian Undergraduate Students. Journal of American College Health 1 1. (In Press).
  • O'Brien MW*, Daley WS*, Schwartz BD*, Shivgulam ME*, Wu Y*, Kimmerly DS, Frayne RJ. *Co-first authors. (2023). Original Research: Characterization of Detailed Sedentary Postures Using a Tri-Monitor Configuration in Free-Living Conditions. Sensors 23 587. (Published).
  • O’Brien MW, Neyedli HF, Bosquet L, Leadbetter BK, Smith A, Gallant F, Tanguay P, Bélanger M, Mekary S. (2023). Original Research: Convergent Validity and Inter-Rater Reliability of a Lower-Limb Multimodal Physical Function Assessment in Community-Dwelling Older Adults. Frontiers in Aging 4 1196389. (Published).
  • O’Brien MW, Shivgulam ME*, Petterson JL*, Wu Y*, Frayne RJ, Mekari S, Kimmerly DS. (2023). Original Research: Habitual Sedentary Time and Stationary Time are Inversely Related to Aerobic Fitness. Sports Medicine & Health Science 4 260-266. (Published).
  • O’Brien MW, Schwartz BD*, Shivgulam ME*, Daley WS, Frayne RJ, Kimmerly DS. (2023). Original Research: Higher Habitual Lying Time but Not Sitting Time is Associated with Worse Heart Rate Variability in Younger Adults. Applied Physiology, Nutrition, and Metabolism 48 (11), 876-881. (Published).
  • O'Brien MW, Nardone M, Foster M, Coovadia Y, Usselman CW, Taylor CE, Millar PJ, Kimmerly DS. (2023). Original Research: Higher Sympathetic Transduction is Independently Associated with Greater Very Short-Term Diastolic Blood Pressure Variability in Young Healthy Males and Females. Clinical Autonomic Research 33 (4), 529-532. (Published).
  • O’Brien MW, Kimmerly DS, Theou O. (2023). Original Research: Impact of Age and Sex on the Relationship Between Carotid Intima-Media Thickness and Frailty Level in the Canadian Longitudinal Study of Aging. Journal of Cardiology 82 140-145. (Published).
  • O’Brien MW, Mallery K, Rockwood K, Theou O. (2023). Original Research: Impact of Hospitalization on Patients Ability to Perform Basic Activities of Daily Living. Canadian Geriatric Journal 26 524-529. (Published).
  • Courish MK*, Shivgulam ME*, MacLeod JR, Kimmerly DS, O’Brien MW. (2023). Original Research: Impact of Unilateral Dual-Brachial Arteries on Endothelial-Dependent and Independent Vasodilation: A Case Study. Applied Physiology, Nutrition, and Metabolism. 48 1019-1022. (Published).
  • Pellerine LP*, Bray NW, Fowles JR, Furlano JA, Morava A, Nagpal TS, O’Brien MW. (2023). Original Research: Increased Screen Time During Leisure and Time to Fall Asleep are Associated with Worse Academic Performance in Canadian Undergraduate Students. International Journal of Health Promotion and Practice. 1 1. (In Press).
  • Schwartz BD*, Shivgulam ME*, Petterson JL*, Wu Y*, Frayne RJ, Kimmerly DS, O'Brien MW. (2023). Original Research: More Moderate-Intensity Physical Activity and Less Prolonged Sedentary Time are Associated with Better Very Short-Term Systolic Blood Pressure Variability in Healthy Adults. Journal of Human Hypertension 37 (11), 1015-1020. (Published).
  • O’Brien MW, Pellerine LP*, Howitt SD, deGraauw C, Fowles JR. (2023). Original Research: Physical Activity Counselling and Exercise Prescription Practices of Chiropractors in Canada and Internationally: An Exploratory Survey. Journal of the Canadian Chiropractic Association. 67 (2), 105-116. (Published).
  • O’Brien MW, Kimmerly DS, Theou O. (2023). Original Research: Sex-Specific Frailty and Chronological Age Normative Carotid Artery Intima-Media Thickness Values Using the Canadian Longitudinal Study of Aging. Vascular In Press 1. (In Press).
  • Pellerine LP*, Petterson JL*, Shivgulam ME*, Johansson PJ, Hettiarachchi P, Kimmerly DS, Frayne RJ, O’Brien MW. (2023). Original Research: Step Length, But Not Stepping Cadence Strongly Predicts Activity Intensity During Jogging and Running. Measurement of Physical Education and Exercise Science 27 (4), 352-361. (Published).
  • Shivgulam ME*, Petterson JL*, Pellerine LP*, Kimmerly DS, O’Brien MW. (2023). Original Research: The Stryd Foot Pod is a Valid Measure of Stepping Cadence During Treadmill Walking and Running. Journal for the Measurement of Physical Behaviour 6 73-78. (Published).
  • Shivgulam ME*, Fryane RJ, Schwartz BD*, Wu Y*, Daley WS, Kimmerly DS, O'Brien MW. (2023). Original Research: Validity of ActivPAL CREA Software Detection of Sitting and Lying During Free-Living Conditions. Physiological Measurement 44 (7), 075003. (Published).
  • Theou O, O’Brien MW, Godin J, Blanchard C, Cahill L, Hajizadeh M, Hartley P, Jarrett P, Kehler DS, Romero-Ortuno R, Visvanathan R, Rockwood K. (2023). Original Research Protocol: Interrupting Bedtime to Reverse Frailty Levels in Acute Care: A Study Protocol for the Breaking Bad Rest Study. BMC Geriatrics 23 482. (Published).
  • Liu H*, O’Brien MW, Rayner S*, Kimmerly DS. (2023). Perspective: Are supine assessments an ecologically valid method to characterize sitting-induced declines in lower-limb vascular health?. American Journal of Physiology – Heart & Circulatory Physiology 325 142-144. (Published).
  • O’Brien MW, Pellerine LP*, Shivgulam ME*, Kimmerly DS. (2023). Perspective: Disagreements in Physical Activity Monitor Validation Study Guidelines Create Challenges in Conducting Validity Studies. Frontiers in Digital Health 4 1063324. (Published).
  • Palmer KL, Shivgulam ME*, Champod AS, Wilson BC, O'Brien MW, Bray NW. (2023). Review Article: Exercise Interventions Augment Brain Activity and Reduce Pain Perceptions in Adults with Chronic Pain: A Systematic Review. Neurobiology of Pain 13 100129. (Published).
  • Shivgulam ME*, Liu H*, Schwartz BD*, Langley JE, Bray NW, Kimmerly DS, O’Brien MW. (2023). Review Article: Impact of Exercise Training Interventions on Flow-Mediated Dilation in Adults: An Umbrella Review. Sports Medicine 53 1161-1174. (Published).
  • Liu Hv, Shivgulam ME*, Schwartz BD*, Kimmerly DS, O’Brien MW. (2023). Review Paper: The Impact of Exercise Training on Pulse Wave Velocity in Adults: An Umbrella Review. American Journal of Physiology – Heart and Circulatory Physiology 325 (5), H933-H948. (Published).
  • O’Brien MW, Petterson JL*, Pellerine LP*, Shivgulam ME*, Kimmerly DS, Fryane RJ, Hettiarachchi P, Johansson PJ. (2023). Technical Note: Moving Beyond the Characterization of Activity Intensity Bouts as Square-Waves Signals. Journal for the Measurement of Physical Behaviour 6 162-167. (Published).
  • Petterson JL*, McPhee B, Wu Y*, O’Brien MW. (2022). Commentary: Does COVID-19 Influence the Sympathetic Regulation of Blood Pressure?. Journal of Physiology 599 (22), 4951-4953. (Published).
  • O'Brien MW, Shivgulam ME*, Wojcik WR, Lewis BA, Seaman R, Fowles JR. (2022). Original Research: 30 Year Trends of Reduced Physical Fitness in Undergraduate Students Studying Human Movement. International Journal of Environmental Research and Public Health 19 14099. (Published).
  • Petterson JL*, Mekari S, O’Brien MW. (2022). Original Research: An Open-Source Stroop Task Program That Incorporates a Switching Condition to Determine Executive Function. Software Impacts 13 100361. (Published).
  • Pellerine LP*, Kimmerly DS, Fowles JR, O'Brien MW. (2022). Original Research: Calibrating the Physical Activity Vital Sign to Estimate Habitual Moderate-to-Vigorous Physical Activity More Accurately in Active Young Adults: A Cautionary Tale. Journal for the Measurement of Physical Behaviour 5 (2), 103-110. (Published).
  • O’Brien MW, Johns JA, Frayne RJ, Kimmerly DS. (2022). Original Research: Comparison of Habitual Stepping Cadence Analysis Methods: Relationship with Step Counts. Gait & Posture 92 328-332. (Published).
  • O'Brien MW, Schwartz BD*, Petterson JL*, Kimmerly DS. (2022). Original Research: Comparison of Signal-Averaging and Regression Approaches to Analyzing Sympathetic Transduction. Clinical Autonomic Research 32 (4), 299-302. (Published).
  • Pellerine LP*, O'Brien MW, Shields CA, Crowell SJ, Strang R, Fowles JR. (2022). Original Research: Health Care Providers’ Perspectives on Promoting Physical Activity and Exercise in Health Care. International Journal of Environmental Research & Public Health 19 (15), 9466. (Published).
  • O'Brien MW, Petterson JL*, Kimmerly DS. (2022). Original Research: Impact of Sampling Duration on Spontaneous Sympathetic Transduction. Clinical Autonomic Research 32 155-158. (Published).
  • Shivgulum ME*, O’Brien MW*, Johns JA, Petterson JL*, Wu Y*, Frayne RJ, Kimmerly DS. *Co-first authors. (2022). Original Research: Impact of habitual sedentary patterns on popliteal artery endothelial-dependent vasodilation in healthy adults. Vascular Medicine. 27 (2), 120-126. (Published).
  • O'Brien MW, Shivgulam ME*, Petterson JL*, Wu Y*, Johns JA, Frayne RJ, Kimmerly DS. (2022). Original Research: Substituting Stationary Time with Moderate-Intensity Activity May Improve Flow-Mediated Dilation. Journal of Cardiopulmonary Rehabilitation and Prevention 42 E105-E107. (Published).
  • Petterson JL*, O'Brien MW, Ramsay DJ, Johnston WJ, O'Neill CD, Dogra S, Mekary S, Floras JS, Kimmerly DS. (2022). Original Research: Sympathetic Neurohemodynamic Transduction is Attenuated in Older Males Independent of Aerobic Fitness. Clinical Autonomic Research 32 (1), 73-76. (Published).
  • O'Brien MW, Petterson JL*, Johns JA, Mekary S, Kimmerly DS. (2022). Original Research: The Impact of Different Step Rate Threshold Methods on Physical Activity Intensity in Older Adults. Gait & Posture 94 51-57. (Published).
  • Pellerine LP*, Bray NW, Fowles JR, Furlano JA, Morava A, Nagpal TS, O’Brien MW. (2022). Original Research: The Influence of Motivators and Barriers to Exercise on Attaining Physical Activity and Sedentary Time Guidelines Among Canadian Undergraduate Students. International Journal of Environmental Research & Public Health 19 12225. (Published).
  • O'Brien MW, Mekary S, Kimmerly DS. (2022). Perspective: Aging, Cardiorespiratory Fitness and Sympathetic Transduction. Aging 14 (10), 4189-4190. (Published).
  • O'Brien MW, Kimmerly DS. (2022). Perspective Article: Is ‘Not Different’ Enough to Establish Similar Cardiovascular Responses Between Sexes?. American Journal of Physiology - Heart & Circulatory Physiology 322 (3), H355-H358. (Published).
  • Wu Y*, Petterson JL*, Bray NW, Kimmerly DS, O'Brien MW. (2022). Review Article: Validity of the ActivPAL Monitor to Measure Stepping Activity and Activity Intensity: A Systematic Review. Gait & Posture 97 165-173. (Published).
  • O'Brien MW, Wu Y*, Petterson JL*, Bray NW, Kimmerly DS. (2022). Review Article: Validity of the ActivPAL to Distinguish Postures: A Systematic Review. Gait & Posture 94 107-113. (Published).
  • O'Brien MW, Petterson JL*, Wu Y*, Bray NW, Kimmerly DS. (2022). Review Article: What is the Impact of Physical Behaviours on Low-Flow-Mediated Vasoconstriction? A Systematic Review of Observational and Intervention Studies. Vascular Medicine 27 (2), 193-202. (Published).
  • O'Brien MW, Liu H*, Shivgulam ME*, Langley JE, Bray NW, Kimmerly DS. (2022). Review Article Protocol: The Impact of Exercise Training Interventions on Flow-Mediated Dilation: An Umbrella Review Protocol. Healthy Populations Journal 2 (1), 106-115. (Published).
  • Shivgulam ME*, Petterson JL*, O'Brien MW. (2022). Viewpoint: Habitual Activity and Aerobic Fitness May Complement Iron Status When Conducting Sex Comparisons. Journal of Applied Physiology 132 (3), 703-709. (Published).
  • O’Brien MW*, Wong MYS*, Sui W, Voss ML, Bray NW, Turnbull CN, Nagpal TS, Fowles JR. *Co-first authors. (2021). Commentary: Learnings from Exercise is Medicine Canada Workshops as Strategies to Assist Medical Students Promote Physical Activity During and Beyond the COVID-19 Pandemic. Journal of Medical Education Research 1 (1), 25-33. (Published).
  • O’Brien MW, Bray NW, Kivell MJ, Fowles JR. (2021). Invited Review: A Scoping Review of Exercise Referral Schemes Involving Qualified Exercise Professionals in Primary Health Care. Applied Physiology, Nutrition and Metabolism 46 (9), 1007-1018. (Published).
  • O’Brien MW, Petterson JL, Johns JA, Mekary S, Kimmerly DS. (2021). Original Research: A Larger Low-Flow Mediated Constrictor Response is Associated with Augmented Flow-Mediated Dilation in the Popliteal Artery. Clinical Physiology and Functional Imaging 41 (6), 497-504. (Published).
  • O’Brien MW, Ramsay DJ, O’Neill CD, Petterson JL, Dogra S, Mekary S, Kimmerly DS. (2021). Original Research: Aerobic Fitness is Inversely Associated with Neurohemodynamic Transduction and Blood Pressure Variability in Older Adults. GeroScience 43 (6), 2737-2748. (Published).
  • O’Brien MW, Petterson JL, Kimmerly DS. (2021). Original Research: An Open-Source Program to Analyze Spontaneous Sympathetic Neurohemodynamic Transduction. Journal of Neurophysiology 125 (3), 972-976. (Published).
  • O’Brien MW, Wu Y, Johns JA, Poitras J, Kimmerly DS. (2021). Original Research: Development and Validation of Accelerometry Count-Based Model of Physical Activity Intensity in Adults. Medical Engineering and Physics 95 45-50. (Published).
  • Liu H, O'Brien MW, Johns JA, Kimmerly DS. (2021). Original Research: Does aerobic fitness impact prolonged sitting-induced popliteal artery endothelial dysfunction?. European Journal of Applied Physiology 121 (11), 3233-3241. (Published).
  • O'Brien MW, Wu Y*, Petterson JL*, Frayne RJ, Kimmerly DS. (2021). Original Research: Ecological Validity of Prolonged Sitting Studies – How Well Do They Represent Real Life Sedentary Patterns? A Pilot Study. Translational Journal of the ACSM 7 (1), e000182. (Published).
  • Fowles JR, O’Brien MW, Comeau KG, Thurston B, Petrie HJ. (2021). Original Research: Flattened Cola Improves High-Intensity Interval Performance in Competitive Cyclists. European Journal of Applied Physiology 121 2859-2867. (Published).
  • O’Brien MW, Kimmerly DS, Mekary S. (2021). Original Research: Greater Habitual Moderate-To-Vigorous Physical Activity is Associated with Better Executive Function and Higher Prefrontal Oxygenation in Older Adults. GeroScience 43 (6), 2707-2718. (Published).
  • Wu Y, Johns JA, Poitras J, Kimmerly DS, O'Brien MW. (2021). Original Research:Improving the Criterion Validity of The Activpal in Determining Physical Activity Intensity During Laboratory and Free-Living Conditions. Journal of Sport Science 39 (7), 826-834. (Published).
  • O’Brien MW*, Al-Hinnawi A*, Johns JA, Kimmerly DS. *Co-first authors. (2021). Original Research: Spontaneous cardiovagal baroreflex sensitivity is unaffected by an acute bout of prolonged sitting: No impact of sex, menstrual or oral contraceptive phases. Clinical Autonomic Research 31 (6), 783-786. (Published).
  • O’Brien MW, Ramsay D, Johnston W, Kimmerly DS. (2021). Original Research: The Association Between Habitual Posture and Intensity-Related Physical Activity with Sympathetic Neurohemodynamic Transduction in Young Males. Clinical Autonomic Research 31 (2), 339-341. (Published).
  • O’Brien MW, Shields CA, Dunbar MJ, Crowell SJ, Fowles JR. (2021). Original Research: The Effects of Previous Educational Training on the Physical Activity Counselling Practices among Dietitians Across Canada. Canadian Journal of Dietetic Practice and Research 83 (1), 35-40. (Published).
  • O’Brien MW, Johns JA, Petterson JL, Mekary S, Kimmerly DS. (2021). Original Research: The Impact of Age and Sex on Popliteal Artery Endothelial-Dependent Vasodilator and Vasoconstrictor Function. Experimental Gerontology 145 111221. (Published).
  • O’Brien MW, Al-Hinnawi A, Wu Y, Petterson JL, Shivgulum ME, Johns JA, Frayne RJ, Kimmerly DS. (2021). Original Research: The Influence of Habitual Breaks in Sedentary Time on Cardiovagal Baroreflex Function. Applied Physiology, Nutrition and Metabolism 46 (9), 1143-1146. (Published).
  • O’Brien MW, Wojcik WR, Fowles JR. (2021). Original Research: Validity and Inter-Instrument Reliability of a Medical Grade Physical Activity Monitor in Older Adults. Journal for Measurement of Physical Behaviour 4 (1), 31-38. (Published).
  • O'Brien MW. (2021). Review Article: Implications and Recommendations for Equivalence Testing in Measures of Movement Behaviours: A Scoping Review. Journal for Measurement of Physical Behaviour 4 (4), 353-362. (Published).
  • O'Brien MW, Ramsay D, Johnston W, Kimmerly DS. (2020). Original Research: Aerobic Fitness and Sympathetic Responses to Spontaneous Muscle Sympathetic Nerve Activity in Young Males. Clinical Autonomic Research 31 (2), 253-261. (Published).
  • O'Brien MW, Shields CA, Solmundson K, Fowles JR. (2020). Original Research: Exercise is Medicine Canada Workshop Training Improves Physical Activity Practices of Physicians Across Canada, Independent of Initial Confidence. Canadian Medical Education Journal 11 (5), 5-15. (Published).
  • Mekari S, Neyedli HF, Fraser S, O'Brien MW, Martins R, Evans K, Earle M, Aucoin R, Chiekwe J, Hollohan Q, Kimmerly DS, Dupuy O. (2020). Original Research: High-Intensity interval training Improves Cognitive Flexibility in Older Adults. Brain Sciences 10 (11), 796. (Published).
  • O'Brien MW, Johns JA, Robinson SA, Bungay A, Mekary S, Kimmerly DS. (2020). Original Research: Impact of High-Intensity Interval Training, Moderate-Intensity Continuous Training, and Resistance Training on Endothelial Function in Older Adults. Medicine and Science in Sports and Exercise 52 (5), 1057-1067. (Published).
  • Petterson JL, O’Brien MW, Johns JA, Chiasson J, Kimmerly DS. (2020). Original Research: Influence of Prostaglandins and Endothelial-Derived Hyperpolarizing Factors on Brachial and Popliteal Endothelial-Dependent Function in Young Adults. Journal of Applied Physiology 130 (1), 17-25. (Published).
  • O'Brien MW, Johns JA, Dorey TW, Frayne RJ, Fowles JR, Mekary S, Kimmerly DS. (2020). Original Research: Meeting International Aerobic Physical Activity Guidelines is Associated with Enhanced Cardiovagal Baroreflex Sensitivity in Healthy Older Adults. Clinical Autonomic Research 30 (2), 139-148. (Published).
  • O'Brien MW, Johns JA, Al-Hinnawi A, Kimmerly DS. (2020). Original Research: Popliteal Flow-Mediated Dilatory Responses to A Bout of Prolonged Sitting Between Earlier and Later Phases of Natural Menstrual and Contraceptive Pill Cycles. Journal of Applied Physiology 129 (4), 637-645. (Published).
  • Johns JA, O'Brien MW, Bungay A, Kimmerly DS. (2020). Original Research: Sex and Light Physical Activity Impact Popliteal, but not Brachial Artery, Flow-Mediated Dilation in Physically Active Young Adults. Applied Physiology, Nutrition and Metabolism 45 (12), 1387-1395. (Published).
  • Johns JA, Frayne RJ, Goreham JA, Kimmerly DS, O'Brien MW. (2020). Original Research: The Bout Cadence Method Improves the Quantification of Stepping Cadence in Free-Living Conditions. Gait & Posture 79 96-101. (Published).
  • O'Brien MW, Johns JA, Fowles JR, Kimmerly DS. (2020). Original Research: Validity of the activPAL and Height-Adjusted Curvilinear Cadence-METs Equation in Healthy Young. Measurement in Physical Education and Exercise Science 24 (2), 147-156. (Published).
  • O'Brien MW, Shields CA, Campbell KL, Crowell S, Fowles JR. (2019). Original Research: Perceptions and Practices of Providing Physical Activity Counselling and Exercise Prescription Among Physiotherapists in Nova Scotia. Physiotherapy Canada 72 (3), 230-238. (Published).
  • O'Brien MW, Johns JA, Robinson SA, Mekary S, Kimmerly DS. (2019). Original Research: Relationship Between Brachial and Popliteal Artery Low-Flow Mediated Constriction in Older Adults: Impact of Aerobic Fitness on Vascular Endothelial Function. Journal of Applied Physiology 127 (1), 134-142. (Published).
  • O'Brien MW, Johns JA, Williams TD, Kimmerly DS. (2019). Original Research: Sex Does Not Influence Impairments in Popliteal Endothelial-Dependent Vasodilator or Vasoconstrictor Responses to Prolonged Sitting. Journal of Applied Physiology 127 (3), 679-687. (Published).
  • Robinson SA, O'Brien MW, Grandy S, Heinze-Milne S, Kimmerly DS. (2019). Original Research: Short-Term Supplement of Virgin Coconut Oil Improves Endothelial-Dependent Dilation But Not Exercise-Mediated Hyperemia in Young Adults. Nutrition Research 67 17-26. (Published).
  • Dorey TD, O'Brien MW, Kimmerly DS. (2019). Original Research: The Influence of Aerobic Fitness on Electrocardiographic and Heart Rate Variability Parameters in Young and Older Adults. Autonomic Neuroscience: Basic and Clinical 217 66-70. (Published).
  • O'Brien MW, Mekary S, Robinson SA, Johns JA, Kimmerly DS. (2019). Original Research: The Relationship Between Aerobic Fitness and Low-Flow Mediated Constriction in Older Adults. European Journal of Applied Physiology 119 (2), 351-359. (Published).
  • O'Brien MW, Robinson S, Frayne R, Mekary S, Fowles J, Kimmerly DS. (2018). Original Research: Achieving Canadian Physical Activity Guidelines is Associated with Improved Vascular Function Independent of Aerobic Fitness and Sedentary Time in Older Adults. Applied Physiology, Nutrition, and Metabolism 43 (10), 1003-1009. (Published).
  • Fowles JR, O'Brien MW, Solmundson K, Oh PI, Shields CA. (2018). Original Research: Exercise is Medicine Canada Physical Activity Counselling and Exercise Prescription Training, Improves Counselling, Prescription and Referral Practices Among Physicians Across Canada. Applied Physiology, Nutrition, and Metabolism 43 (5), 535-539. (Published).
  • Dorey TD, O'Brien MW, Robinson S, Kimmerly DS. (2018). Original Research: Knee-High Compression Socks Minimize Head?Up Tilt-Induced Cerebral and Cardiovascular Responses Following Dynamic Exercise. Scandinavian Journal of Medicine & Science in Sports 28 (7), 1766-1774. (Published).
  • O'Brien MW, Wojcik WR, Fowles JR. (2018). Original Research: Medical-Grade Physical Activity Monitoring for Measuring Step Count and Moderate-to-Vigorous Physical Activity: Validity and Reliability Study. JMIR mHealth and uHealth 6 (9), e10706. (Published).
  • O'Brien MW, Kivell MJ, Wojcik WR, d'Entremont G, Kimmerly DS, Fowles JR. (2018). Original Research: Step Rate Thresholds Associated with Moderate and Vigorous Physical Activity in Adults. International Journal of Environmental Research and Public Health 15 (11), 2454. (Published).
  • O'Brien MW, Shields CA, Crowell S, Theou O, McGrath P, Fowles JR. (2018). Original Research: The Effects of Previous Educational Training on Physical Activity Counselling and Exercise Prescription Practices Among Physicians Across Nova Scotia: A Cross-Sectional Study. Canadian Medical Education Journal 9 (4), e35-e35. (Published).
  • O'Brien MW, Kivell MJ, Wojcik WR, d'Entremont G, Kimmerly DS, Fowles JR. (2018). Original Research: The Influence of Anthropometrics On Step Rate Thresholds for Moderate and Vigorous Physical Activity in Older Adults: A Scientific Modelling Study. JMIR Aging 1 (2), e12363. (Published).
  • O'Brien MW, Wojcik WR, d'Entremont L, Fowles JR. (2018). Original Research: Validation of the PiezoRx Step Count and Moderate to Vigorous Physical Activity Times in Free Living Conditions in Adults: A Pilot Study. International Journal of Exercise Science 11 (7), 541-551. (Published).
  • Fowles JR, O'Brien MW, Wojcik WR, d'Entremont L, Shields CA. (2017). Original Research: A Pilot Study: Validity and Reliability of the CSEP-PATH PASB-Q and a new Leisure Time Physical Activity Questionnaire to Assess Physical Activity and Sedentary Behaviors. Applied Physiology, Nutrition, and Metabolism 42 (6), 677-680. (Published).
  • O'Brien MW, Shields CA, Oh PI, Fowles JR. (2017). Original Research: Health Care Provider Confidence and Exercise Prescription Practices of Exercise is Medicine Canada Workshop Attendees. Applied Physiology, Nutrition, and Metabolism 42 (4), 384-390. (Published).

Chapitres de livre

  • Olga Theou, Myles O'Brien, Debra Rose. (2023). Chapter: Physical Activity and Health Aging. Kenneth Rockwood, Ruth E. Hubbard, and Andrew Clegg.. Brocklehurst's Textbook of Geriatric Medicine and Gerontology, 9th Edition (1-10). Netherlands : Elsevier. (In Press).
  • Myles O'Brien, Judith Godin. (2023). Chapter: Sex Differences in Frailty. Olga Theou, Jorge Ruiz. Frailty: A Multidisciplinary Approach to Assessment, Management, and Prevention (51-54). Germany : Springer. (Published).

Traductions

  • Is Achieving Canadian Physical Activity Guidelines Important For Blood Vessel Health in Older Adults?. (2018). CSEP-SCPE Communique. 1-2. (Published).

Articles de conférence

  • Waghorn J, Kennedy-Inamoto M, MacDonald E, Inkpen S, Shivgulam M, Neyedli H, Theou O, Kimmerly D, O’Brien M. (2024). A Standing Desk Converter Clinical Trial Reduced Sedentary Time and Increased Standing Time, But Did Not Change Resting Cardioautonomic Outcomes in Healthy Young Adults. Canadian Society for Exercise Physiology. (In Press).
  • Ahmadi S, O’Brien M, Faivre P, Quirion I, Dupuy O, Bélanger M, Mekari S. (2024). Are Improvements in Cognitive Performance and Physical Fitness Following a Community Physical Activity Program Maintained Long-Term in older adult females?. Canadian Society for Exercise Physiology. (In Press).
  • Ahmadi S, Faivre P, Quirion I, O’Brien M, Sénéchal M, Dupuy O, Bélanger M, Mekari S. (2024). Changes in executive function and brain oxygenation among older adults following a physical exercise training program. European Sport Science Conference. (Accepted).
  • Faive P, Admadi S, Quirion I, Bélanger M, O’Brien M, Dupuy O, Mekari S. (2024). Cognitive functions changes after physical training in older adults in the community: examining cardiorespiratory fitness and prefrontal cortex oxygenation influences. Canadian Society for Exercise Physiology. (In Press).
  • Faive P, Quirion I, Admadi S, Bélanger M, O’Brien M, Dupuy O, Mekari S. (2024). Effects of a Physical Activity Community Program on Cognitive and Physical Functions in Older Adults. International Society for Physical Activity and Health. (Accepted).
  • Waghorn J, Maxwell SP, Rayner SE, Moyer R, Rockwood K, THeou O, Rizkallah M, O’Brien M. (2024). Frailer Older Adults are at an Increased Risk of Osteoarthritis Incidence, Falls, and Lower-Limb Surgery in the Osteoarthritis Initiative. Canadian Society for Exercise Physiology. (In Press).
  • Rayner SE, Maxwell SP, Waghorn J, Moyer R, Rockwood K, Theou O, O’Brien M. (2024). Frailty moderates the relation between moderate-to-vigorous physical activity & stationary time with knee osteoarthritis symptoms. Canadian Society for Exercise Physiology. (In Press).
  • Shivgulam ME, Wilson T, Choi M, MacDonald E, Theou O, O’Brien M. (2024). Higher frailty levels are associated with increased improvement in health-related quality of life following a 12-week community-based walking program. Canadian Society for Exercise Physiology. (In Press).
  • MacDonald E, Waghorn J, Shivgulam ME, Kimmerly D, Theou O, O’Brien MW. (2024). Impact and Perceptions of a Workplace Wellness Initiative Providing a Standing Desk Converter to Academic Staff. American College of Sports Medicine. (Published).
  • Choi M, Wilson T, Shivgulam M, MacDonald E, Waghorn J, Mekari S, Theou O, O’Brien MW. (2024). Impact of a Medical Student Led Walk with a Future Doc Program on Executive Function in Older Adults. American College of Sports Medicine. (Published).
  • MacDonald E, Courish M, Shivgulam M, Theou O, O’Brien M. (2024). Impact of a Traumatic Brain Injury on Frailty Levels in the Canadian Longitudinal Study on Aging. Canadian Society for Exercise Physiology. (In Press).
  • Wilson T, Shivgulam M, Choi M, Thoeu O, O’Brien MW. (2024). Impact of a Walk with a Future Doc Program on Participant Frailty Levels. American College of Sports Medicine. (Published).
  • Mekari S, O’Brien MW, Faive P, Quirion I, Admadi S, Sénéchal M, Dupuy O, Bélanger M. (2024). Improvement in Aerobic Fitness Moderate Faster Executive Function After Exercise Training in Older Adults. International Society for Physical Activity and Health. (Accepted).
  • Ahmadi S, O’Brien M, Faivre P, Quirion I, Dupuy O, Bélanger M, Mekari S. (2024). Is the Reduction of Frailty Associated with a Community-Based Exercise Program Maintained Over Time?. International Society for Physical Activity and Health. (In Press).
  • Waghorn J, Schwartz B, Shivgulam M, Wu Y, Kimmerly D, O’Brien MW. (2024). Meeting Muscle Strengthening Guidelines is Associated with Better Cardiovagal Baroreflex Sensitivity in Adults. American College of Sports Medicine. (Published).
  • Courish M, Maxwell S, Mekari S, Kimemrly D, Theou O, O’Brien MW. (2024). Relationship Between Frailty and Executive Function by Age and Sex in the Canadian Longitudinal Study on Aging. American College of Sports Medicine. (Published).
  • Shivgulam ME, Godin J, Liu H, MacDonald E, Courish MK, Huerta Dombinguez A, Theou O, Tovar-Diaz J, O’Brien MW. (2024). Sedentary Time and Television Viewing Time Increase Risk for All-Cause Mortality Regardless of Physical Activity: An Umbrella Review and Harmonized Dose-Response Meta-Analysis. Canadian Society for Exercise Physiology. (In Press).
  • Waghorn J, Liu H, Wu Y, Rayner SE, Kimmerly DS, O’Brien MW. (2023). A Single Bout of Prolonged Sitting Augmented Very Short-Term Blood Pressure Variability in Young Males and Females. Canadian Society for Exercise Physiology. (Published).
  • Courish MK, Shivgulam ME, Kivell MJ, Petterson JL, O’Brien MW. (2023). A Systematic Review of Educational Interventions on Physicians’ Physical Activity Counselling and Exercise Prescription Practices. Canadian Society for Exercise Physiology. (Published).
  • Shivgulam ME, O’Brien MW. (2023). Applying Average-Real Variability to Quantifying Day-Day Physical Activity and Sedentary Postures Variability. Canadian Society for Exercise Physiology. (Published).
  • Pellerine L, Millar K, Frayne R, O’Brien M. (2023). Characterizing Habitual Physical Activity and Sedentary Time in Patients with An Acquired Brain Injury. American College of Sports Medicine. (Published).
  • Stilwell C, Kontak J, Zubriski S, Budarick A, Caldwell H, Luongo G, Joy P, O’Brien M, Quach J, Title M, Watson C, Wong H, Yusuf J, Ritcey G, Kirk S. (2023). Equitable opportunities through student-led, peer review publishing: The creation and future of the Healthy Populations Journal. Canadian Association for Health Services and Policy Research. (Published).
  • Inkpen S, Liu H, Rayner SE, Shields E, O’Brien MW. (2023). Exercise Referral Schemes Involving a Qualified Exercise Professional Increase Patients’ Cardiorespiratory Fitness: A Systematic Review. Canadian Society for Exercise Physiology. (Published).
  • Wilson T, Theou O, O’Brien M. (2023). Feasibility of A “Walk with A Future Doc” Program. American College of Sports Medicine. (Published).
  • Shivgulam ME, Petterson JL, Johns JA, Kimmerly DS, O’Brien MW. (2023). Free-Living Bent-Legged Sitting is Negatively Associated with Popliteal Artery Nitroglycerin-Mediated Dilation in Healthy Young Adults. Canadian Society for Exercise Physiology. (Published).
  • Rayner S, Liu H, Petterson J, O’Brien M, Kimmerly D. (2023). Impact of Aerobic Fitness on Lower-limb Resistance Vessel Function Following a Prolonged Bout of Uninterrupted Sitting. American College of Sports Medicine. (Published).
  • Courish M, Shivgulam M, MacLeod J, Kimmerly D, O’Brien M. (2023). Impact of Brachial Bifurcation on Endothelial-dependent And Independent Vasodilation: A Case Study. American College of Sports Medicine. (Published).
  • Liu H, Schwartz B, Wu Y, Petterson J, Rayner S, O’Brien M, Kimmerly D. (2023). Impact of High-Intensity Interval Training on Popliteal Vascular Responses to Prolonged Sitting. American College of Sports Medicine. (Published).
  • Schwartz B, Petterson J, McPhee B, Bowman G, O’Brien M, Kimmerly D. (2023). Impact of High-intensity Interval Training on Spontaneous Sympathetic Transduction in Healthy Younger Adults. American College of Sports Medicine. (Published).
  • MacDonald E, Morrison EG, Shivgulam ME, Pellerine LP, Kimmerly DS, Bray NW, Mekari S, O’Brien MW. (2023). Moderate Intensity Intermittent Lifestyle Physical Activity is Associated with Better Executive Function in Older Adults. Canadian Society for Exercise Physiology. (Published).
  • O’Brien M, Kimmerly D, Theou O. (2023). Relationship Between Carotid Intima-media Thickness and Frailty Level in the CLSA. American College of Sports Medicine. (Published).
  • Bowman G, Schwartz B, Petterson J, O’Brien M, Kimmerly D. (2023). The Impact of Aerobic Fitness on Isometric Handgrip-Mediated Assessment of Sympathetic Transduction. American College of Sports Medicine. (Published).
  • Liu H, Shivgulam ME, Schwartz BD, Kimmerly DS, O’Brien MW. (2023). The Impact of Exercise Training on Pulse Wave Velocity in Adults: A Systematic Review of Systematic Reviews. Canadian Society for Exercise Physiology. (Published).
  • Courish MK, Pellerine LP, Petterson JL, Shivgulam ME, Kimmerly DS, O’Brien MW. (2023). The activPAL Accurately Detects Steps During Walking but Underpredicts Stepping During Jogging/Running. Canadian Society for Exercise Physiology. (Published).
  • Shivgulam ME, Liu H, Schwartz BD, Langley JE, Bray NW, Kimmerly DS, O’Brien MW. (2022). An umbrella review of the impact of exercise training interventions on flow-mediated dilation in adults. Canadian Society for Exercise Physiology. (Published).
  • Wu Y, Peddle A, Daley WS, O’Brien MW, Frayne RJ. (2022). Criterion Validity of Tri-Monitor ActivPAL Configuration in Determining Knee-Flexion Angles during Sitting in Laboratory Setting. American College of Sports Medicine. (Published).
  • Palmer KL, Shivgulam ME, Champod AS, Wilson BC, O’Brien MW, Bray NW. (2022). Exercise Interventions Augment Brain Function and Reduces Pain Perception in Adults with Chronic Pain: A Systematic Review. Canadian Society for Exercise Physiology. (Published).
  • Liu H, Rayner S.E, Wu Y, O’Brien MW, Kimmerly DS. (2022). Impact of Sex on Popliteal Endothelium-Dependent and Independent Vasodilatory Responses to Prolonged Sitting. Canadian Society for Exercise Physiology. (Published).
  • Schwartz BD, Shivgulam ME, Petterson JL, Wu Y, Frayne RJ, Kimmerly DS, O’Brien MW. (2022). Impact of habitual sedentary time and physical activity on beat-by-beat blood pressure variability in healthy adults. Canadian Society for Exercise Physiology. (Published).
  • Pellerine LP, Bray NW, Fowles JR, Furlano JA, Morava A, Nagpal TS, O’Brien MW. (2022). Impact of motivators and barriers to exercise on attaining to physical activity and sedentary time guidelines among Canadian undergraduate students. Canadian Society for Exercise Physiology. (Published).
  • Petterson JL, O’Brien MW, McPhee BN, Johnston WJ, Ramsay DJ, Floras JS, Kimmerly DS. (2022). Lower Neurohemodynamic Transduction in Young Females Versus Males With Similar Aerobic Fitness And Sympathetic Outflow. American College of Sports Medicine. (Published).
  • O’Brien MW, Shivgulam ME, Petterson JL, Wu Y, Johns JA, Frayne RJ, Kimmerly DS. (2022). Substituting Stationary Time with Moderate-Intensity Activity May Improve Brachial Flow-Mediated Dilation: An Isotemporal Substitution Approach. American College of Sports Medicine. (Published).
  • Liu H, Wu Y, Bustamante CM, O’Brien MW, Kimmerly DS. (2022). The impact of an acute bout of prolonged sitting on popliteal endothelium-dependent and independent vasodilation. Canadian Society for Exercise Physiology. (Published).
  • Morrison EG, Petterson JL, Shivgulam ME, Kimmerly DS, O’Brien MW, Shields CA, Bray NW. (2022). Towards understanding the relationship between physical activity, frailty, and cognitive function. Canadian Society for Exercise Physiology. (Published).
  • Pellerine L, Kimmerly DS, Fowles JR, O’Brien MW. (2021). Criterion Validation of the Physical Activity Vital Sign Questionnaire Estimation of Habitual Moderate-Vigorous Physical Activity in Younger and Older Adults. Canadian Society for Exercise Physiology. (Published).
  • Liu H, O’Brien MW, Johns JA, Al-Hinnawi A, Kimmerly DS. (2021). Does Higher Aerobic Fitness Impact Prolonged Sitting-Induced Popliteal Artery Endothelial Dysfunction in Younger Healthy Adults?. Canadian Society for Exercise Physiology. (Published).
  • Petterson JL, O’Brien MW, Kimmerly DS. (2021). Impact of Aerobic Fitness on Sympathetic Neurohemodynamic Transduction in Older Males. Canadian Society for Exercise Physiology. (Published).
  • Shivgulam M, O’Brien MW, Johns JA, Petterson JL, Kimmerly DS. (2021). Impact of Habitual Sedentary Patterns on Popliteal Artery Endothelial-Dependent Vasodilation in Healthy Adults. Canadian Society for Exercise Physiology. (Published).
  • Wu Y, O’Brien MW, Johns JA, Petterson JL, Kimmerly DS. (2021). Relationship Between Habitual Sedentary Patterns and Autonomic Heart Rate Control in Younger Adults. Canadian Society for Exercise Physiology. (Published).
  • Al-Hinnawi A, O’Brien MW, Johns JA, Kimmerly DS. (2020). Cardiovagal baroreflex sensitivity is unaffected by sex, menstrual or oral contraceptive pill phases in response to an acute bout of prolonged sitting. Canadian Society for Exercise Physiology. (Published).
  • O’Brien MW, Ramsay D, Johnston W, Kimmerly DS. (2020). Higher aerobic fitness attenuates the neurovascular responses to spontaneous bursts of muscle sympathetic nerve activity in males. Canadian Society for Exercise Physiology. (Published).
  • Wu Y, Johns JA, Poitras J, Kimmerly DS, O’Brien MW. (2020). Improving the criterion validity of the activPAL in determining physical activity intensity during laboratory and free-living conditions. Canadian Society for Exercise Physiology. (Published).
  • Petterson JL, O’Brien MW, Johns JA, Chiasson J, Kimmerly DS. (2020). Influence of prostaglandins and endothelial-derived hyperpolarizing factors on brachial and popliteal endothelial-dependent function in young adults. Canadian Society for Exercise Physiology. (Published).
  • O'Brien MW, Johns JA, Robinson SA, Mekary S, Kimmerly DS. (2019). Comparison of Endothelial-Dependent Vasodilatory and Vasoconstrictor Responses Between Upper- and Lower-Limb Arteries in Older Adults. Medicine and Science in Sport and Exercise (MSSE), (Published).
  • Johns JA, O'Brien MW, Bungay A, Mekary S, Kimmerly DS. (2019). The Influence of Habitual Moderate-Vigorous Physical Activity Level Versus Aerobic Fitness on Age-Related Endothelial Function. Medicine and Science in Sport and Exercise (MSSE), (Published).
  • O’Brien MW, Johns JA, Robinson SA, Mekary S, Kimmerly DS. (2019). The effects of short-term aerobic and resistance exercise training on popliteal artery low-flow-mediated constriction in older adults. Canadian Society for Exercise Physiology. (Published).
  • Johns JA, Bungay A, O’Brien MW, Kimmerly DS. (2019). vasoconstrictorThe influence of sex, aerobic fitness, moderate-vigorous physical activity and sedentary time on brachial and popliteal artery function in healthy young adults. Canadian Society for Exercise Physiology. (Published).
  • Johns JA, Bungay A, O’Brien MW, Kimmerly DS. (2019). vasodilatorThe influence of sex, aerobic fitness, moderate-vigorous physical activity and sedentary time on brachial and popliteal artery function in healthy young adults. Canadian Society for Exercise Physiology. (Published).
  • Robinson S, O'Brien MW, Kimmerly DS. (2018). Federation of American Societies for Experimental Biology, (Published).
  • O'Brien MW, Robinson S, Evans K, Mekary S, Kimmerly DS. (2018). Can Six-Weeks of Whole-Body Resistance Training Improve Endothelial Function in Older Adults?. Federation of American Societies for Experimental Biology, (Published).
  • O'Brien MW, Shields CA, Fowles JR. (2018). Exercise is Medicine Canada Training Improves Physical Activity Practices in Physicians Across Canada Independent of Initial Confidence. Applied Physiology, Nutrition, and Metabolism, (Published).
  • Johns JA, O'Brien MW, Williams TD, Kimmerly DS. (2018). Influence of Menstrual Phase on Sitting-Induced Vascular Dysfunction. Applied Physiology, Nutrition, and Metabolism, (Published).
  • O'Brien MW, Shields CA, Crowell S, McGrath P, Fowles JR. (2018). Perspectives on Facilitating and Sustaining Physical Activity and Exercise Promotion in Healthcare Among Diabetes Care Providers in Nova Scotia. Canadian Journal of Diabetes, (Published).
  • O'Brien MW, Shields CA, Crowell S, McGrath P, Fowles JR. (2018). Physical Activity Counselling and Exercise Prescription Practices of Physiotherapists in Nova Scotia. Medicine and Science in Sport and Exercise (MSSE), (Published).
  • O'Brien MW, Robinson S, Mekary S, Kimmerly DS. (2018). The Effects of Short-Term High-Intensity Interval Versus Moderate-Intensity Continuous Training on Vascular Function in Older Adults. Federation of American Societies for Experimental Biology, (Published).
  • O'Brien MW, Shields CA, Fowles JR. (2017). "Stepping-Up" to the Challenge: Diabetes Care Professionals Promoting Physical Activity. Canadian Journal of Diabetes, (Published).
  • O'Brien MW, Shields C, Oh PI, Fowles JR. (2017). Effectiveness of the Exercise is Medicine Canada Training Workshops on Physician Counselling and Prescription Practices. Medicine and Science in Sport and Exercise (MSSE), (Published).
  • O'Brien MW, Ramsay D, Mekary S, Dogra S, O'Neill C, Kimmerly DS. (2017). Is There a Relationship Between Resting Sympathetic Nerve Activity and Leg Vascular Conductance in Aerobically-Trained Older Adults?. Federation of American Societies for Experimental Biology, (Published).
  • O'Brien MW, Shields CA, Crowell S, Theou O, McGrath P, Fowles JR. (2017). The Effect of Previous Training on Perceptions and Practices of Physical Activity Counselling and Exercise Prescription Among Healthcare Providers Across Nova Scotia. Applied Physiology, Nutrition, and Metabolism, (Published).
  • O'Brien MW, Shields CA, Yungblut S, Oh PI, Fowles JR. (2016). Effectiveness of the Exercise is Medicine Canada Physical Activity Counselling and Exercise Prescription Resources Among Physicians Across Canada. Applied Physiology, Nutrition, and Metabolism, (Published).
  • Fowles JR, O'Brien MW, Yungblut S, Oh PI, Shields CA. (2016). Implementation of Exercise is Medicine Canada Exercise Prescription Resources Among Health Care Providers Across Canada. Applied Physiology, Nutrition, and Metabolism, (Published).
  • O'Brien MW, Shields CA, Yungblut S, Fowles JR. (2016). Opposition and Opportunity: Reported Challenges and Changes to Practice Within the Context of Exercise is Medicine Canada Initiative. Journal of Exercise, Movement, and Sport, (Published).
  • Shields CA, Fowles JR, O'Brien MW, Yungblut S, Fortier MS, Oh PI. (2015). Exercise is Medicine Canada: Early But Important Signs of the Effectiveness of this National Initiative. Journal of Exercise, Movement, and Sport, (Published).
  • Fowles JR, O'Brien MW, Yungblut S, Oh P, Shields CA. (2015). Exercise is Medicine Canada: Implementation and Perceived Effectiveness of the Exercise is Medicine Canada Workshops Among Health Care Providers. Applied Physiology, Nutrition, and Metabolism, (Published).
  • O'Brien MW, Wojcik WR, D'Entremont L, Mekary S, Fowles JR. (2015). Validation of PiezoRx® Step Count and Moderate to Vigorous Physical Activity Times in Free Living Conditions in Adults. Applied Physiology, Nutrition, and Metabolism, (Published).
  • Wojcik WR, O'Brien MW, Fowles JR. (2015). Validity of Step Count and Intensity Related Physical Activity Measures of Several Physical Activity Monitoring Devices. Applied Physiology, Nutrition, and Metabolism, (Published).