Regular physical activity (PA) is one of the simplest ways for individuals and populations to reduce the risk of premature death and incident cardiovascular disease (CVD). Participating in PA has been associated with lower CVD risk in observational studies of people with and without prior CVD1,2 as well as in randomized clinical trials with people with CVD.3 These studies have almost all been conducted in high-income countries where leisure or recreational PA is the predominant form of PA. However, globally, 80% of CVD deaths occurs in middle-income and low-income countries, where it is the leading cause of death. In these countries, PA is mainly nonrecreational and there are few studies that have reported on the association of such PA on clinical outcomes.
Scott A. Lear, Salim Yusuf. Physical Activity to Prevent Cardiovascular DiseaseA Simple, Low-Cost, and Widely Applicable Approach For All Populations. JAMA Cardiol. Published online November 08, 2017. doi:10.1001/jamacardio.2017.4070