This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Labor Day is here, which means hot weather, ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. MUSCLE SHOALS, Ala. — Students at Muscle ...

Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

Muscle growth takes time, persistence, and a long-term commitment to the process. But it’s possible for most people with proper training programs and protein consumption. Muscle building is often a ...