How do Muscles Get Bigger?

Muscles will get bigger when you apply pressure to your muscles requiring them to push or lift more weight. Weight bearing exercise such as resistance training where you train your body to handle more weight through repetitions and sets of repetitions. As your muscles handle the added weight it causes small tears in the muscle tissues. After a workout, these muscles should be given a resting period (at least a day) to be able to repair these small tears to add strength by increasing the size of the muscle tissue.