24-Hour Cycle

The 24-hour cycle, known as the circadian rhythm, is the natural internal clock that regulates most physiological processes over a day. It influences sleep-wake patterns, hormone production, body temperature, and other functions, helping your body adapt to the day-night cycle. Typically, it aligns with daylight hours—making you alert during the day and sleepy at night—ensuring optimal functioning. This cycle is driven by the brain’s internal clock, primarily in the hypothalamus, and is influenced by external cues like light exposure. Maintaining a regular sleep schedule helps keep this rhythm balanced for overall health.