Most of us wish we exercised more. After all, fewer than half of us get the recommended amount of physical activity, and we know it. But is it possible to get too much of a good thing?It turns out that the answer is yes. Exercise provides many health benefits, but at some point working out too hard or too long increases the risk of injury and other adverse effects. That usually only happens with intense exercise, like training for marathons or endurance activities. Such challenging activities are perfectly fine, maybe even laudable endeavors, but if you’re looking for optimal health benefits, research suggests that more moderate workouts are generally the way to go.