So can you exercise too much? Perhaps at extreme levels, and most certainly if you are sick with a serious infection or injured and need to recover. You also increase your risk of musculoskeletal injuries if you haven’t adapted your bones, muscles, and other tissues to handle the stresses of repeated high forces of Olympic-level weight lifting, playing five sets of tennis a day, running marathons, or overdoing some other sport that obsesses you. In other respects, the negative effects of too much exercise appear to be ridiculously less than the negative effects of too little.
