Mark S. Tremblay

Senior Scientist, CHEO Research Institute

Professor Mark Tremblay has a Bachelor of Commerce degree in Sports Administration and a Bachelor of Physical and Health Education degree from Laurentian University. His graduate training was from the University of Toronto where he obtained his M.Sc. and Ph.D. from the Department of Community Health with a specialty in Exercise Science. Dr. Tremblay is a senior scientist with the Healthy Active Living and Obesity Research (HALO) Research Group at the Children’s Hospital of Eastern Ontario Research Institute and Professor of Pediatrics in the Faculty of Medicine, University of Ottawa. He is a Fellow of the Canadian Society for Exercise Physiology, Fellow of the American College of Sports Medicine, Fellow of the Canadian Academy of Health Sciences, President of the Active Healthy Kids Global Alliance, Founder of the Sedentary Behaviour Research Network, Chair of Outdoor Play Canada, and Adjunct/Visiting Professor at five other universities on four continents.

Dr. Tremblay has published >580 scientific papers and book chapters in the areas of childhood obesity, physical activity measurement, exercise physiology, sedentary physiology, outdoor play and health surveillance. His Scopus h-index is >90 and his published research has been cited >35,000 times, consistently placing him on the Clarivate list of highly cited researchers (top 1% in the world). He has delivered over 800 scholarly conference presentations, including more than 150 invited and keynote addresses, in 22 different countries. Dr. Tremblay received an honorary doctorate from Nipissing University, the Queen Elizabeth II Diamond Jubilee Medal, the Lawson Foundation 60th Anniversary Award, the Canadian Society for Exercise Physiology Honour Award, the Victor Marchessault Advocacy Award from the Canadian Pediatric Society, the Vic Neufeld Mentorship Award in Global Health Research from the Canadian Coalition for Global Health Research, the International Network of Time-Use Epidemiologists Laureate Award, and the Canadian Institutes of Health Research Trailblazer Award in Population and Public Health Research for his leadership contributions to healthy active living in Canada and around the world. Dr. Tremblay’s most productive work has resulted from his 33-year marriage to his wife Helen, yielding four wonderful children.

Related News

Research Projects

  1. Meeting 24-h movement guidelines and health-related quality of life in youths during the COVID-19 pandemic


    Our results show that the participants enrolled in the current study who met the 24 h movement guidelines presented with higher HRQoL scores during the COVID-19 pandemic. Moreover, adherence to all the 24 h movement guidelines was inversely related to worries/sadness/unhappy feelings during the first part of the COVID-19 pandemic.

  2. A standardized core outcome set for measuring and reporting sedentary behaviour interventional research: the CROSBI Consensus Study


    This open access CROSBI provides a data collection and reporting tool for use across many adult populations and domains of living. Widespread adoption will improve the quality and synthesis of data from intervention studies in adults, and thereby improve synthesis of evidence, management of resources and ultimately interventions for sedentary behaviour change. Researchers should refer to this COS when designing and reporting intervention studies related to SB to improve quality, aid interpretation and allow pooling of results in meta-analyses.

  3. An Intervention to Increase Outdoor Play in Early Childhood Education Centers (PROmoting Early Childhood Outside): Protocol for a Pilot Wait-list Control Cluster Randomized Trial


    The results and lessons learned through this study will inform the feasibility of a full-scale randomized trial that continues to assess the effectiveness of the intervention as well as help develop guidelines for the implementation of the PRO-ECO intervention in other ECECs. Furthermore, the health economic analyses will generate data to inform the sustainability of future academic and health policies in ECECs.

  4. Regional differences in movement behaviours of children and youth during the second wave of the COVID-19 pandemic in Canada: Follow-up from a national study


    This study provides an examination of regional differences in movement and play behaviours among Canadian children and youth during the second wave of the COVID-19 pandemic.

  5. Associations between children’s physical literacy and well-being: is physical activity a mediator?


    The study found beneficial relations between PL and physical and psychosocial well-being. MVPA mediated part of the relationship between PL and physical well-being but not psychosocial well-being.