Published on 31 Jan 2020
When you start exercising a muscle there is first an increase in the nerve impulses that cause muscle contraction. This alone often results in strength gains without any noticeable change in muscle size. As you continue to exercise, there is a complex interaction of nervous system responses that result in an increase in protein synthesis over months and the muscle cells begin to grow larger and stronger.
There are two essential components necessary for the growth of muscles—stimulation and repair. Stimulation occurs during the contraction of the muscle, or during the actual exercising of the muscle. Each time that a muscle is exercised, contraction occurs. This repeated contraction during a workout causes damage to the internal muscle fibers. These muscle fibers are broken down throughout the course of a workout. Once damaged, these fibers are then ready to be repaired. This is where muscle growth occurs.
Muscle fiber repair occurs after the workout while the muscles are in resting mode. New muscle fibers are produced to help replace and repair the damaged ones. More fibers are produced to make up for the damaged ones, and this is where the actual muscle growth takes place.
Researchers are beginning to identify a potential third important component—peripheral fatigue.Peripheral fatigue occurs when you are unable to complete exercises and it may occur at the end of strenuous activity. Studies are ongoing but scientists believe that the more peripheral fatigue you can induce, the harder the muscles have to work and the more the muscle that is stimulated, the more hypertrophy occurs. However, more research needs to be conducted to fully understand the relationship