Again, a lot of research showing this. And by the way, this applies to all ages.To all ages. Well, not all ages. I hope. 21 and on.Now the important thing to remember about exercise-it is not a panacea.It's not a fix-all. Remember not everyone benefits from exercise.There are some people for whom medication is absolutely the right thing and it's important.However, in many situations, and it's eveident by, by literature, by research-in most situations, exercise can help.Even it's not on its own. Even in conjunction with something else. It helps.And again why fight nature? Why fight it? Nature to be commanded must be obeyed.What's very important is recovery. Let me read you something that Dienstbier and Zilligwrite about in the Handbook of Positive Psychology to researchers in the field: "Repeated workouts that are too intense to allow complete recovery may cause endurance athletes to experience 'staleness, 'a syndrome that is characterized by increased psychological symptoms of anxietywith increased sympathetic nervous system, catecholamine, and cortisol base levels."Now what they are saying here is that there can be too much of a good thing.And this is especially important for perfectionists to understandIt doesn't mean that more is always better when it comes to exercise.There is too much-and some of the symptoms of overtraining are very similar to the symptoms of undertraining.