Most people acknowledge that there are two types of sleepers in the world—early birds and night owls—but research has shown that there are actually four or more sleep-wake cycles. The time you ...

If you feel more sluggish during certain times of the day, it could be due to your sleep chronotype. The chronotype affects the body’s natural tendency to be asleep or awake, according to the Sleep ...

Add Yahoo as a preferred source to see more of our stories on Google. Being forced to go to sleep and wake up earlier than your chronotype has consequences. (Getty Images) Are you a night owl who ...

High-profile early starters such as Apple chief executive Tim Cook, entrepreneur Richard Branson and actor Jennifer Aniston ...

Early to rise makes a person healthy and wise? Not necessarily. Depending on how your body clock is wired, the opposite may be true! Every person's body is set to follow daily patterns, including one ...

Rather than forcing early routines, the more useful question is how to identify your own rhythm and work with it ...

You wake up at the crack of dawn and power through mornings at work. By the afternoon, though, you’re crashing. Compare that to your work wife, who struggles to keep her eyes open all morning but ...

Please provide your email address to receive an email when new articles are posted on . Chronotype may be a predictor of depression among middle- to older-aged women, researchers found. Sensitivity ...