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 the Director of Healthy Active Living and Obesity Research (HALO) 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 500 scientific papers and book chapters in the areas of childhood obesity, physical activity measurement, exercise physiology, sedentary physiology, outdoor play and health surveillance. His h-index is 75 and his published research has been cited 22,000 times according to Scopus. He has delivered over 800 scholarly conference presentations, including more than 150 invited and keynote addresses, in 21 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, and the Vic Neufeld Mentorship Award in Global Health Research from the Canadian Coalition for Global 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 31-year marriage to his wife Helen, yielding four wonderful children.

Related News

Research Projects

  1. Parental psychological problems were associated with higher screen time and the use of mature-rated media in children


    This cross-sectional study was not able to examine causal associations.

  2. Children’s screen use and school readiness at 4-6 years in kindergarten: Prospective cohort study


    Screen use in early childhood is associated with increased vulnerability in developmental readiness for school, with increased risk for poorer language and cognitive development in kindergarten, especially among high users.

  3. Prevalence and associated factors of excessive recreational screen time among Colombian children and adolescents


    These interventions should promote limiting the availability of electronic devices in children’s bedrooms and not eating in front of screens.

  4. Individual and family characteristics associated with health indicators at entry into multidisciplinary pediatric weight management: Findings from the CANadian Pediatric Weight management Registry (CANPWR)


    This highlights the importance of these modifiable health behaviors on multiple health indicators in children with obesity.

  5. Physical activity and active transportation behaviour among rural, peri-urban and urban children in Kenya, Mozambique and Nigeria: The PAAT Study


    Most correlates of AT and PA were country-specific, suggesting that strategies to encourage both behaviours should be informed by local evidence.