People can build muscle by using their muscles more, such as by lifting weights or working out. Eating enough calories and protein is also important. Skeletal muscle is one of the three major muscle ...

Muscle weakness may be due to a chronic condition or an infection. Conditions that can weaken muscles include Addison’s disease, anemia, diabetes, fibromyalgia, and more. Muscle weakness is a lack of ...

The core components of health-related fitness include cardiovascular and muscular endurance, flexibility, and your body’s ratio of fat compared to muscle and bone. It’s well known that being ...