Last year, I reviewed over 500 articles related to exercise and health. As an avid exercise enthusiast, even I was amazed at the proven benefits of regular exercise. I see this every day in my practice. People who don't exercise almost invariably say that their energy is not what they would like. If they start an exercise program, their energy not only improves dramatically, but they volunteer that they just feel better overall.
Exercise significantly improves self-esteem and helps prevent depression.
When you come home from work and feel stressed out, try walking vigorously for 30 minutes. It is amazing how much better you will feel. You'll also think and work better. When people claim they don't have time to exercise, I suggest they will get more done more quickly. Exercise improves concentration, creative thinking, and sleep.