Your circadian rhythm is your body’s internal clock. Light, sleep patterns, hormones, meals, and temperature can all influence your circadian rhythm, which in turn can influence your overall health.

The above graphs show data from teenagers and adults who participated in an 11-day activity study. Each person's Horne-Ostberg score was plotted on the x-axis and his average waking time on the y-axis ...

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 ...