Author Affiliations: Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada (Dr Chaput; firstname.lastname@example.org); School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada (Dr Janssen); and Faculty of Physical Activity and Recreation, University of Alberta, Edmonton, Canada (Dr Spence).
To the Editor: Dr Ekelund and colleagues1 reported that time spent sedentary is unrelated to established cardiometabolic risk factors after adjusting for time spent in moderate- to vigorous-intensity physical activity (MVPA). Although the authors studied 20 871 children and adolescents and measured sedentary time in an objective way, we believe it is premature to conclude that sedentary time is not associated with adverse cardiometabolic health outcomes in children.
Chaput J, Janssen I, Spence JC. Time Spent Sedentary and Active and Cardiometabolic Risk Factors in Children. JAMA. 2012;307(19):2024–2025. doi:10.1001/jama.2012.3629