This discovery changes the way scientists think about aging. It suggests that part of what we call age-related weakness may actually be a communication problem between the brain and the muscles. As ...

The brain controls movement by sending electrical messages through nerves to the muscles. When this communication becomes weaker with age, the muscles may not respond with full strength even if they ...

PAF causes strong contractions—especially in the muscles of the esophagus and the stomach’s upper region (called the gastric fundus). In other parts of the intestine, such as the small intestine and ...

A new study suggests that muscle strength, particularly grip strength, is associated with longevity and could offer a practical screening tool for aging-related risk.

At one point or another, we’ve all experienced the unexpected, intense pain of a muscle cramp. Muscle cramps, also known as muscle spasms or charley horses, are the involuntary contraction of muscle ...

A gene known as ACTN3 (α-actinin-3) has earned the nickname “the gene for speed,” and it may have an influence on how androgens work through the androgen receptor to maintain muscle mass. Research has ...

Looking for the right hue to paint your weight room? Try red--it may well enhance your performance. A new study by psychologists says that seeing the color red leads humans to react more quickly and ...