Type IIb fast-twitch myofibers, known for their rapid contraction speed, are plentiful in small mammals but have largely diminished in humans. Researchers at the University of Tsukuba have discovered ...

The flow of water within a muscle fiber may dictate how quickly muscle can contract, according to a University of Michigan study. Nearly all animals use muscle to move, and it's been known for a long ...

People who suffer from the autoimmune disease myasthenia gravis experience muscle weakness that can affect any of the muscles we use to blink, smile or even move our body around. Researchers have ...