What is the effect of physical activity on mortality?
A systematic review and meta-analysis of data from more than 1 million men and women by Ekelund et al. (2016) found that physical activity can attenuate, or even eliminate, the detrimental association of sitting time with mortality. Additionally, a meta-analysis of prospective cohort studies by Hamer and Chida (2008) found that walking was associated with a decreased risk of mortality.