The Difference: Athletic bodies have muscle tone and definition that skinny bodies lack, but significantly less mass than muscular bodies. Think runner, swimmer, or general fitness enthusiast rather ...

Body composition refers to the distribution of fat, muscle, bone, and other tissues that make up your body. It is often expressed as the percentage of total body weight that consists of fat and/or ...

Maintaining a good level of physical fitness is important. However, it can be difficult to determine what fitness entails. Various components of physical health can help determine physical fitness.