A review of 12 large-scale studies on the connection between exercise and fatigue was made. The studies took place from 1945 to 2005, and each study measured the amount of physical activity that participants were doing and how much energy or fatigue the participants experienced. All of the studies found a direct link between a reduced risk of fatigue for people who were physically active compared to those who were inactive.

The trick, of course, is exercising when you feel fatigued. Tired people generally do not want to put on their sneakers and go for a run. The good news is that even a little bit of increased activity seems to be helpful. You don’t need to run 8 miles a day to feel more energy; a 15-minute walk can do wonders.

If you are trying to exercise for more energy, the hardest thing to do is schedule the time. Choose a consistent time that you can exercise daily (like first thing in the morning, just before lunch or when you get home from work). Make your goal to exercise at least 4 days a week and never go more than 1 day without exercising. That way, you'll never get out of the habit of exercising.