This is “science!”

Muscle size increases when a person continually challenges the muscles to deal with higher levels of resistance or weight. This process is known as muscle hypertrophy. Muscle hypertrophy occurs when the fibers of the muscles sustain damage or injury. #trainer #fitness #training #personaltrainer #coach #workout #gym #motivation #fit #fitnessmotivation #bodybuilding #health #sport #fitfam #coaching #muscle … Continue reading This is “science!”