An interesting study linking exercise to mental illness, and noting that the reduced benefits of too much exercise. Moderation is better (I like this message!). Quote:
“The largest mental health differences occurred with two to four hours of exercise per week,” wrote Yeon Soo Kim, M.D., and colleagues at Teachers College, Columbia University.
“Beyond four hours, the trend begins to reverse. About 65 percent of those with poorer mental health exercised more than four hours per week, compared to 55 percent of adults in better mental health.”
The researchers were surprised to discover that when 7.5 hours of exercise were exceeded each week, symptoms of depression and anxiety rose significantly. This was the case in both men and women, and in people of all ages and different levels of health.
However, further research is needed to determine whether people who are more prone toward depression or anxiety are simply more likely to engage in extensive physical activity as a way to keep their mental symptoms under control, or whether larger amounts of exercise may actually cause symptoms of depression and anxiety.
The researchers also add that their findings support “the notion that regular activity may lead to prevention of mental health disorders.”