What factors affect energy levels for exercise?
July 22, 2007 7:28 AM Subscribe
Sometimes when I exercise I feel full of energy. Other days, I feel weak and a little nauseous. This happens even when I get a good amount of sleep every night (7-8 hrs), and even when I've eated a good breakfast (say, oatmeal or cereal) an hour before exercising. What factors affect energy, especially during exercise? What does it take to get that bubbling, bursting, "I can conquer the world" energy every day?