Circadian Rhythm
Did you ever notice that you feel sleepy around the same time every day? Constantly running in the background of your brain and body, the circadian rhythm is a built-in 24-hour clock. It guides your body as to when you should be feeling sleepy, as well as when it’s time for your body to feel energized. The circadian rhythm is the built-in smart alarm clock you constantly carry with you, guiding your sleep schedule and daily energy rhythm. Your circadian rhythm works best when you regulate your habits, like going to bed at night when it’s dark and waking up in the morning when it’s light. Naturally, the way evolution configured us.

How sleep regularity can help you fix your sleep schedule

How does the end of Daylight Saving Time impact your sleep? Here's a plan to help you adjust
While it may feel like we’re gaining an hour of sleep when daylight savings time ends, the time change can actually make us sleep less for about a week.

How to use light to reset your circadian rhythm
The sleep-wake cycle is regulated by the body’s internal 24-hour clock – the circadian rhythm. But spending too much time indoors may be disrupting it.
How does our circadian rhythm work?
Learn how the body clock works and why it's so important.Sleeping on New Year’s Eve
The tradition to celebrate and stay up till the stroke of midnight to mark the occasion is practiced worldwide, but what happens to your body clock when you stay up past midnight?Are you a micro sleeper? The answer could be in your genes
Some peoples ability to ‘micro-sleep’ can be found in their genes.Male vs female circadian rhythm: Women suffer more from disruptions to their circadian rhythm than men
Survey also reveals that men are more willing to forego sex if it interferes with their sleep schedule.