When I was trained as an American physician, I was never exposed to the concept of muscle strength testing that is utilized as part of the pseudo-scientific field of applied kinesiology (AK). To be ...

Study reveals 20 DNA markers in fast-twitch muscle that predict age within 4 years and explain why sprinting declines before ...

Building your fast-twitch muscle fibers can help you get stronger and faster. This type of muscle fiber is responsible for the fast, explosive movements used in activities like sprinting, jumping, and ...

Aldolase helps your body turn sugar into energy. Most of it is stored in your muscles and liver. When these cells are damaged, they release aldolase into your blood. Measuring the amount of aldolase ...

Amyotrophic lateral sclerosis (ALS) is a progressive disease of the nervous system. It affects nerve cells in the brain and spinal cord called motor neurons. Motor neurons control muscle movement and ...

Loss of muscle mass, also called muscle wasting or atrophy, can happen gradually as part of getting older or more suddenly due to underlying medical conditions. Other factors can contribute, like ...

A muscle strain is when you damage a muscle or the tendons attached to it. (Photo credit: PhotoAlto Agency RF Collections/Getty Images) A muscle strain is an injury that happens when you overstretch ...

In results of a study of 130 patients scheduled to undergo arthroscopic rotator cuff tear repair surgery, the supine Napoleon test was superior to the lift-off, bear-hug and Napoleon tests when used ...