There are a number of explanations that have proposed to explain how exercise reduces stress. Exercise has been shown to decrease “stress hormones” such as cortisol and increase endorphins commonly referred to as body’s “feel good” chemicals, i.e., “runner’s high.” From a psychological perspective, improvements in body image, self-esteem, self-confidence or mastery have been shown to be related to reductions in stress. Or it could simply be that taking time out from the stresses of your day and going for a 20 minute walk may contribute to the positive benefits of exercise. In addition to reducing stress, exercise has also been found to act as a stress-buffer with people who exercise regularly seemingly better equipped to handle stress they face in their everyday lives. Although the explanation for why exercise reduces stress is still unknown, it is likely to involve the interplay between the body and the mind. The bottom line however is that people who exercise experience not only a reduction in their current stress levels but also an enhanced ability to cope with stress in the future.