But how do sleep cycles work? To find out, I took part in a polysomnography. This is a gold standard sleep study that helps ...

"Deep sleep builds your immune system, and REM sleep regulates and fine-tunes it," says Darwall-Smith agrees. During deep ...

Scientists are finding experimental evidence that the transition between wakefulness and sleep is a portal for creative thought.

Sexual activity—whether partnered or solo—improves sleep efficiency and reduces night-time wakefulness, according to a pilot ...

Stage 1: The lightest sleep or N1 The first stage of sleep is the lightest stage of sleep and is also a non-REM stage (N1).

Whoop has begun rolling out an update to its sleep tracking that improves stage analysis and awake recognition ... PSG wake as light sleep, 20% of PSG N1 or N2 as REM, 32% of PSG N3 as light ...