When you exercise, your body loses energy and strength. Aerobic exercise such as running tends to deplete glycogen stores and dehydrate you, and anaerobic exercise such as weightlifting taxes muscle fibers, breaking or tearing them and making you feel sore. If your exercise session is intensive or long enough, drinking a healthy post-workout beverage can shorten your recovery time, alleviate muscle soreness and even improve strength, power, body composition and exercise performance..