The body's circadian rhythm significantly affects energy levels by regulating sleep-wake cycles and hormonal fluctuations throughout the day. Disruptions to this natural rhythm, caused by factors like irregular sleep patterns or excessive screen time, can lead to altered energy levels and fatigue. Maintaining a consistent sleep schedule supports the body's natural rhythms, promoting better sleep quality and optimal alertness during waking hours. This synchronization with the circadian rhythm enhances overall productivity and well-being by aligning energy levels with daily activities and responsibilities, thereby improving performance and mood.