OTTAWA, Canadaâ€”April 23, 2013 Researchers have discovered that participation in physical activity of at least moderate intensity is more critical to childhood cardiometabolic health than overall sedentary time. However, when evaluating the risk of cardiovascular disease, screen time appears to be worse than overall sedentary time.
As members of TEAM PRODIGY, an inter-university research team that includes researchers from the University of Ottawa, University of Montreal, McGill University, and Laval University, researchers at the Childrenâ€™s Hospital of Eastern Ontario (CHEO) Research Institute set out to examine how time spent doing moderate-to-vigorous intensity physical activity (MVPA) and time spent in sedentary behaviour affects the risk of cardiovascular disease in children. The complete article will be published in the latest issue of Applied Physiology, Nutrition, and Metabolism.
â€śAlthough results in this study suggest that in children, time spent in moderate-to-vigorous physical activity appears more important than time spent in sedentary activities, with regard to cardiometabolic health, both increasing childrenâ€™s participation in physical activity AND reducing their screen-related sedentary time are important public health targets to achieve,â€ť said first author, Dr. Jean-Philippe Chaput, who is a researcher at the CHEO Research Institute and a cross-appointed professor at the University of Ottawa.
This cross-sectional study involved over 500 participants between the ages of 8 and 10. The measured outcomes included waist circumference, systolic and diastolic blood pressure, fasting triglycerides, high-density lipoprotein cholesterol, and glucose concentrations.
Higher levels of MVPA were associated with lower waist circumference, fasting triglycerides and diastolic blood pressure, and higher HDL cholesterol, irrespective of sedentary time. In contrast, sedentary time was positively associated with diastolic blood pressure, but after adjustment for MVPA, the association was no longer statistically significant. Self-reported screen time was positively associated with waist circumference and negatively associated with HDL cholesterol independent of MVPA.
â€śToday weâ€™re offering empirical evidence that to reduce cardiovascular disease risk in children, being physically active throughout the day is probably more important than limiting sitting time,â€ť continued Dr. Chaput.
This study was funded by the Canadian Institutes of Health Research, the Heart and Stroke Foundation of Canada and the Fonds de le Recherche en SantĂ© du QuĂ©bec.
About the CHEO Research Institute
Established in 1984, the CHEO Research Institute coordinates the research activities of the Children’s Hospital of Eastern Ontario (CHEO) and is one of the institutes associated with the University of Ottawa teaching hospitals. The Research Institute brings together health professionals from within CHEO to share their efforts in solving paediatric health problems. It also promotes collaborative research outside the hospital with partners from the immediate community, industry and the international scientific world. For more information, please visit: www.cheori.org.
About Applied Physiology, Nutrition, and Metabolism
Editor: Dr. Terry Graham (University of Guelph) One of the NRC Research Press journals, Applied Physiology, Nutrition and Metabolism (issued monthly), publishes original research articles, reviews, and commentaries, focusing on the application of physiology, nutrition, and metabolism to the study of human health, physical activity, and fitness. APNM is affiliated with Canadian Society for Exercise Physiology and the Canadian Nutrition Society. The NRC Research Press journals are published by Canadian Science Publishing. Visit the journal online at www.nrcresearchpress.com/apnm
Canadian Science Publishing publishes the NRC Research Press suite of journals but is not affiliated with the National Research Council of Canada. Papers published by Canadian Science Publishing are peer-reviewed by experts in their field. The views of the authors in no way reflect the opinions of Canadian Science Publishing or the National Research Council of Canada. Requests for commentary about the contents of any study should be directed to the authors.
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