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 ...

Healthy hip flexor muscles are essential for runners—not only do you need them strong, but mobile too. Just think about your stride: When you push off the ground, your hip flexor muscles drive you ...

Your doctor may recommend the creatine phosphokinase (CPK) test if there's a need to measure CPK enzyme levels in your blood. The cells in your body require this creatine kinase enzyme to generate ...

Electromyography (EMG) is a diagnostic test that measures how well the muscles respond to the electrical signals emitted to specialized nerve cells called motor nerves. EMG tests are safe and pose ...

This surprisingly simple walking test is becoming a go-to tool for measuring real cardiovascular fitness—no gym, no gadgets, ...

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 ...

Building muscle depends on several factors and isn't something that'll happen overnight after just one workout.