Leisure Time Physical Activity and Mortality

Abstract

Regular physical activity has consistently been associated with a reduced risk of mortality.^1-3 However, the 2008 Physical Activity Guidelines for Americans⁴ were the first recommendations published by the federal government to describe types and amounts of physical activity that offer health benefits. The 2008 guidelines recommended 150 to 300 minutes of moderate-intensity or 75 to 150 minutes of vigorous-intensity aerobic activity weekly for substantial health benefits. However, the guidelines noted that the upper threshold of benefit for aerobic activity and potential harms associated with very high levels of activity were undefined.