Traditional alarm clocks wake you up at a specific time regardless of what stage of sleep you're in. Sleep Cycle can wake you up when you're in your lightest sleep stage. Having used Sleep Cycle for ...

When you wake up in the morning, it might feel like your brain just switched on at the ring of an alarm, although you still ...

Your toddler climbs into bed with you again at 2:14 a.m. You’ve barely settled back into REM when your alarm goes off. And when you rate your mood in that sleep-tracking app? Meh, at best. According ...

The internet claims waking at the end of a sleep cycle will leave you refreshed, but experts aren’t convinced. By Clarissa Brincat Published Sep 9, 2025 9:00 AM EDT Image: DepositPhotos Get the ...

Ever wonder why some mornings you wake up ready to go, and others you feel like a zombie? The difference often comes down to when you wake up during your sleep cycle, and that’s exactly what a sleep ...

Sleep regularity (waking up and going to bed at the same time every day) could be more important than sleep duration in predicting heart attack and stroke. A new study found that even when individuals ...

Later, I learned that circadian rhythm disorders are very common in bipolar disorder. The condition disrupts the body’s sleep ...

Results of a new study shed fresh light on the relationships between amyloid beta (Aβ) production and clearance throughout the day and night. Among other things, the study uncovered an age-dependent ...

Sleep is of great importance to overall health, but many people struggle to get quality slumber. In an annual survey by U.S. News, which was released in March, thousands of Americans weighed in on ...