The circadian rhythm is the body’s internal 24-hour clock that controls sleep, energy levels, hormone release, metabolism, and body temperature. It is primarily regulated by light exposure, with morning sunlight helping to reset the system and nighttime darkness triggering melatonin for sleep. Disruptions like late-night screen use, irregular sleep schedules, poor meal timing, and lack of daylight can throw this rhythm off, leading to fatigue, reduced focus, slower metabolism, and hormonal imbalance. A consistent daily routine, early light exposure, regular meal timing, and proper sleep habits help keep the body clock aligned, improving sleep quality, energy, performance, and overall health.
