4. Sweet Potatoes
After a long hard session at the gym, your muscle fibers are broken down that needs repairing. If the right nutrients are fed, the muscle will not only repair but grow bigger than it used to be, this is the whole point of lifting heavy weights. Sweet potatoes contain rich carbohydrate contents which is essential to restore glycogen supply that has been lost during the workout. This glycogen supply allows the muscle fiber to repair and thus grow further.