Explain what circadian rhythm is and how it can affect sleep.
Circadian rhythm is a natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours. It is controlled by the body's internal clock, the suprachiasmatic nucleus in the brain. This internal clock responds to external cues such as light and darkness, which help to regulate when we feel sleepy and alert.
When our circadian rhythm is functioning properly, we feel sleepy at night and alert during the day. However, disruptions to this rhythm, such as shift work, jet lag, or irregular sleep schedules, can affect our ability to fall asleep and stay asleep. This can result in difficulty sleeping, poor sleep quality, and feelings of exhaustion during waking hours.
Factors such as exposure to light, meal times, and physical activity can also influence circadian rhythm. Maintaining a consistent sleep schedule, creating a relaxing bedtime routine, and minimizing exposure to bright light before bed can help regulate your circadian rhythm and improve your sleep quality.