Re: A new discussion for 'The projected effect of increasing physical activity on reducing the prevalence of common mental disorders among Canadian men and women: A national population-based community study'

摘要

Temple and Fraser recently comment on our paper (Meng and D'Arcy, 2013) on the projected effect of physical activity on mental disorders using a national population-based community data, and assert that we: 1) misinterpret our data; 2) do not understand causality and potential alternative explanations, and 3) are unaware of the limitations of our study and analyses. However, we believe they misconstrue the nature of our study. Our research builds on the work of others. Previous studies have examined the effects of physical activity/physical inactivity upon mental disorders - for example see the systematic reviews of randomized controlled trials by Daley (2008), Trivedi et al. (2011), and Rimer et al. (2012). Systematic reviews of randomized clinical trials, widely accepted as the strongest evidence of an effect, have consistently supported physical inactivity increases the risk of mental disorders.