Myofascial pain syndrome involves a cycle of muscle spasm and pain. Trigger points in muscles can cause pain in the area and ...

A back spasm involves a sudden, involuntary muscle contraction that can be set off by something as routine as lifting a bag or sitting for too long. Muscle fatigue, dehydration, and nerve irritation ...

WASHINGTON - Most people who work out have a pulling exercise somewhere in their routine - a row, a pulldown, maybe a pull-up. But far fewer could tell you which muscles they’re actually training, or ...