Our lifestyle affects our mental health. And making positive lifestyle changes can greatly benefit us. (This infographic is from Psychology in Everyday Life, 5th Edition, Chapter 14.)
Our distant ancestors lived mostly in a natural, outdoor environment. They were physically active during the day, and they slept at night. They cooperated with others to hunt and gather. Thus, our species is designed for a physically active, socially engaged, well-rested life with plenty of exposure to bright daytime light. Indeed, research shows that exercise, sleep, light exposure, and social connections all reduce depression.