Add Yahoo as a preferred source to see more of our stories on Google. A muscle spasm, also known as a cramp, twitch or charley horse, is the sudden and involuntary forced contraction of a muscle.

Hot and humid climates are particularly conducive to muscle cramps. Studies suggest that athletes, like Sinner, who compete in such conditions are at a higher risk due to the increased sweat loss and ...

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 ...

From 2000 to 2005, a neurological disorder gradually twisted Leslie Harrell's body. Her head was bent over to her left shoulder, and the top half of her body was pulled down to her left hip. Dystonia ...

Sleep jerking, also known as hypnic jerks or sleep starts, is a common phenomenon that many individuals experience during the transitional phase between wakefulness and sleep. It is an involuntary ...