Sometimes, people experience random muscle twitches that interrupt their normal daily activities. This is usually not harmful ...

Medically reviewed by Jennifer Steinhoff, MD Key Takeaways Muscle twitching is often caused by stress or a lack of sleep and ...

Tweaked by a muscle twitch? From an uncontrollable fluttering eyelid to a pulsing calf muscle, these small, rapid involuntary muscle contractions may happen at any time -- and can be annoying.

Q. What causes muscle twitches? They occur all over my body and drive me crazy. Can I take anything to alleviate them? A. Muscle twitching (the medical term is "fasciculation") is common and usually ...

Dear Doctor: I am a 79-year-old woman, and I have in the past had night cramps that went away when I stamped my foot. When it got worse, including a burning sensation, a muscle relaxant helped. It’s ...

After a grueling CrossFit workout on a hot Summer morning that involved kettlebell swings, goblet squats, and about 100 walking lunges, my lower body was toast. But what was weird was that my left ...

Building your fast-twitch muscle fibers can help you get stronger and faster. This type of muscle fiber is responsible for the fast, explosive movements used in activities like sprinting, jumping, and ...