Intensive exercise for muscle drain the energy and even can cause microscopic damage to muscle tissue, needed during recovery. During the recovery, phosphocreatine substances is equipped with a carbohydrate glycogen and creatine which consumed will be the foods or supplements for muscle. Amino acids supplied in the diet will trigger the synthesis of proteins that repair damaged muscle and lead to the formation of larger muscle fibers. To achieve continuous improvement, you will need to continue training intensity otherwise the improvement process will be halted. Fortunately, this is relatively easy to plan provided certain basic principles and clear rules are followed.
Muscle is a tissue in the body whose main duty is contraction. Muscle can cause movement of an organism or movement of organs within the organism.
Three things that can affect muscle development are :

1. Rest – the muscles will develop well over the rest, and muscle also will perform recovery for a microscopic damage.
2. Stimulus – exercise is needed to build muscle and is trained for the use of energy and cause microscopic damage to the fiber.
3. Nutrition – after intense exercise the muscles need to refuel their stores.

Muscle size increases due to hypertrophic adaptation and expansion of cross-section of individual muscle fibers. Intensive training will have an impact on muscle strength that will ultimately affect the type II fibers twitch fastly, so the increase in muscle size is accompanied by greater strength.