Why do people jerk in their sleep?

Those sudden jerks are mostly hypnic jerks, happening as your body shifts into sleep. Sometimes they're more common if you're over-tired or have had a lot of caffeine. Ensuring consistent sleep, a good workout routine, and proper nutrition can help promote more relaxed sleep transitions, but they're usually harmless.

Sleep jerks, or hypnic jerks, are common involuntary muscle twitches that occur as a person is falling asleep. They are usually benign and often associated with factors like stress, anxiety, or caffeine consumption. While generally harmless, if they are severe, frequent, or accompanied by other concerning symptoms, it's advisable to consult a doctor to rule out other sleep disorders.

It's called a hypnic jerk. Very normal when falling asleep.

Oh, I get these all the time, especially when I'm super tired! It's called a hypnic jerk or sleep start. It happens when your brain is transitioning into sleep and interprets the muscle relaxation as falling. Totally normal, just a bit startling sometimes!