I crave sweets after working out. Why? And what can I do about it? —Tim W., Midland, TX

A quick lecture from Workout 101: During exercise your muscles deplete your glucose supply (aka sugar). Afterward, your body works to replenish it—hence the craving. So, in place of M&Ms or gummy bears (a once-popular bodybuilder guilty pleasure, actually), try a flavorful protein shake like Pro & Oats Frosted Cinnamon Roll shake from Universal Nutrition.

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