You should eat both before and after exercise! When you eat before exercise, you’re giving your body immediate energy to use. Something light light a flax seed whole wheat bagel with a chicken breast (white meat, no skin, no bone, no cold-cuts) If you don’t eat properly before hand, your body will start to take the fat from your internal organs (instead of that midsection). After you’ve finished your exercise (especially if you’ve been doing weight lifting), it’s important to eat something rich in protein and light in carbs. If you don’t, your body will go into a state of hunger, and you’ll be even more tempted to inhale the contents of the fridge or binge eat the next time a meal comes up.