A study published in PLOS Medicine on September 17, 2026, found that people who got more REM sleep faced a lower risk of 83 different diseases, based on wrist-accelerometer data from 95,559 UK Biobank ...

Everyone knows a bad night’s sleep can ruin your day—and that routinely struggling to fall and stay asleep can profoundly ...

An extra 47.6 minutes of REM sleep, the spread between the typical low-REM and high-REM sleeper in the UK Biobank, goes with ...

New research suggests it’s extremely important.

In the morning, I open my smartwatch's sleep log.I thought I slept for 7 hours last night, but my REM sleep was short. The ...

Eugene Aserinsky never wanted to study sleep. He tried being a social worker, a dental student, and even did a stint in the army as an explosives handler. He enrolled at the University of Chicago to ...

A 2021 phone poll revealed that only 34% of Americans "sometimes" remember their dreams. About 1 in 10 say they "almost always" can, and the same percentage say they "never" do. Explanations for such ...

Sleep has two phases: non-rapid eye movement (NREM) and rapid eye movement (REM). It also has four stages that repeat in 4 to 6 cycles nightly. Each stage affects your body differently, from light ...

Does nighttime exercise disrupt sleep? Experiments have not found significant disruption, while observational studies have ...

Accidentally kicking your partner or falling out of bed in the middle of the night might seem like something to laugh about in the morning. But dramatic sleep movements might actually be a sign of a ...