Exercise and mental health just seem to go together. The best doctors in the world recommend exercise when you have symptoms of depression or anxiety or if you are just feeling blue. I believe the reason ,besides the obvious, is because when you are paying attention to where you are going that takes your mind off of yourself and whatever is causing your depression or anxiety. Try it sometimes and see if it works for you. Check out this site apatchofbluze.blogspot.com for books and stories, as well as, other information about Depression, Anxiety, PTSD, and other mental health issues.