Delayed sleep phase syndrome (DSPS) is a most prevalent circadian rhythm sleep disorder and is marked by a delay in the timing of sleep episode compared to desired or necessary sleeping and wakeup ...

Your DNA has a big impact on your sleep. It determines your circadian rhythm and even predisposes you to some sleep disorders. Taylor Leamey wrote about all things wellness for CNET, specializing in ...

Advanced sleep phase disorder is a rare condition that causes your natural circadian rhythm, or sleep-wake cycle, to occur earlier than typical. As humans, our sleep-wake cycle— also known as our ...

Medically reviewed by Allison Herries, RDN Key Takeaways Melatonin is a hormone that regulates your circadian rhythm and ...

Non-24-hour sleep-wake disorder (N24SWD) occurs when your sleep-wake cycle gradually shifts out of sync with the 24-hour day. It affects about half of blind people, but it can also affect those with ...

Scientists have recently shown that both the quality and the amount of sleep we get may influence our risk of developing Alzheimer’s disease. Now, a study suggests that people who take significantly ...

Before I was diagnosed with bipolar disorder, I didn’t think twice about sleep. I’d always been a night owl, but I went to bed reasonably early. And I never had trouble falling asleep or getting eight ...

Insomnia isn’t just a result of late nights or poor habits; it’s often a sign of something deeper. If you find yourself wide awake despite feeling tired, there could be an underlying medical reason.

Past age 50, men are much more likely to have REM sleep behavior disorder than women. Jose Luis Pelaez/Stone via Getty Images Every night, you go through four to five sleep cycles. Each cycle, lasting ...