Exercise Boosts Energy

Although many studies have shown that sedentary people who start a regular exercise program experience an increase in energy levels, researchers say few studies have quantified those effects.
In this study, published in Psychological Bulletin, the researchers analyzed 70 studies on exercise and fatigue involving more than 6,800 people.
"More than 90% of the studies showed the same thing: Sedentary people who completed a regular exercise program reported improved fatigue compared to groups that did not exercise," says O'Connor. "It's a very consistent effect."
The results show that regular exercise increases energy and reduces fatigue.
The average effect was greater than the improvement from using stimulant medications, including ones used for attention deficit hyperactivity disorder (ADHD) and narcolepsy.
Researchers say nearly every group studied -- from healthy adults, to cancer patients, and those with chronic conditions including diabetes and heart disease -- benefited from exercise.