"The beauty is that muscle use, in and of itself, is what initiates the processes that keep muscles 'up to date,' healthy, and functional."

People with ACL injuries can lose up to 40% of the muscle strength in that leg. Eccentric exercises can build it back up, research in rats indicates.

Cellular 'muscles' enable cells to exert forces outside of themselves and to propagate. Now, researchers have visualized their movement.

Proteins called Yamanaka factors returned old human cells to a more youthful vigorous state. The proteins worked in a similar way with aging mouse muscles.

Giving the mind more time for visualizing an action substantially improves learning. That new finding upends our ideas about getting better with practice.

Giving a boost to molecules involved in muscle repair could help stave off damage due to Duchenne muscular dystrophy, researchers report.

Researchers theorize that heavy backpacks could explain the difference in fitness between homeschool and public school students.

A protein called Sestrin can mimic the benefits of exercise, research with flies on treadmills shows. The finding could help people with muscle wasting.

A way to turn back the clock on fruit flies' aging heart muscles could lead to new treatments for older humans with heart disease.

To extract nectar from flowers while in flight, moths depend on precise, millisecond timing between their brain and muscles.