Physical Exercise and Depression.

The article focuses on the relationship between physical exercise and depression. The U.S. Department of Health and Human Services has recommended all Americans to engage in 2.5 hours of moderate aerobic physical activity and 1.25 hours of vigorous aerobic physical activity per week. A 2006 study shows that inactive subjects tend to be more depressed than active people. It adds that exercise is still not considered as a first-line or second-line treatment for major depressive disorder (MDD) in the U.S.