The flow of water within a muscle fiber may dictate how quickly muscle can contract, according to a new study. The flow of water within a muscle fiber may dictate how quickly muscle can contract, ...

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 ...

An athlete captured bizarre footage of his calf muscle moving by itself – in a scene reminiscent of a scarab attack in the film The Mummy. The involuntary contraction was caused by a severe cramp, ...

Slow twitch muscle fibres are good for endurance activities like long distance running or cycling. They can work for a long time without getting tired. Fast twitch muscles are good for rapid movements ...

A man has captured bizarre footage of his calf muscle twitching and moving by itself – as if insects are moving around beneath his skin. The involuntary contraction was caused by a severe cramp, which ...