A state of physical and mental health allows you to take part in exercise comfortably and enjoyably so that it doesn’t hurt, so that you can look forward to it, and feel good afterwards.If you are feeling down, exercise may help pick you up. Although researchers disagree on this issue, one review of past studies found that long-term exercise, especially when it includes long-lasting, strenuous training sessions, has about as much of an effect on depression as psychotherapy. Working out helps ...