What is Muscle Mass?

Muscle is tissue in the body that has the ability to contract and also the ability to conduct electrical impulses. Muscle mass can be gained through weight lifting and exercise, which causes the cells to enlarge and create a mass of muscle tissue. There are three types of muscle mass (or tissue): smooth, skeletal and cardiac. Building muscle mass can help build a healthier body and immune system. The best way to build muscle mass is through weight training.