(CNN) — When your shoulders ache or feel stiff, your first instinct might be to stretch or massage them. But the real culprit behind most shoulder problems isn’t surface-level tension — it’s more ...

A pulled muscle is an injury to your muscle fibers. Muscle fibers are the large cells that make up your muscles. Your muscles allow you to move when they contract and relax. Many people use the terms ...

SEATTLE (Nov. 11, 2007) - University of Washington quarterback Jake Locker (Ferndale, Wash.) suffered a stinger and trapezius muscle strain in the second quarter of last ni... Jake Locker and Carl ...

Dana Santas, known as the “Mobility Maker,” is a certified strength and conditioning specialist and mind-body coach in professional sports, and is the author of the book “Practical Solutions for Back ...