Your circadian rhythm helps regulate your natural sleep-wake cycle. Here's how to reset it to improve your sleep, according to an expert. Mercey Livingston is a health and wellness writer and ...

Disruptions to your circadian rhythm, such as jet lag, shift work or too much screen time at night, can affect sleep quality, energy levels, and your overall health.

If you struggle to fall asleep or wake up feeling groggy, an out-of-sync circadian rhythm could be to blame. This internal 24-hour clock controls your sleep-wake cycle, helping your body know when ...

“Your circadian rhythm is your body’s internal 24-hour clock, regulating sleep, energy, digestion, and mood. Ideally, cortisol rises in the morning for alertness, while melatonin increases at ...

Feeling tired all the time? CNN’s Randi Kaye sits down with a neurologist at University of Michigan’s Sleep Disorders Center to learn how modern habits are breaking our natural sleep-wake ...