The natural biological rhythm that helps you sleep at night and stay awake during the day is called the Circadian Rhythm.
This roughly 24-hour internal clock is regulated by the brain and influenced by factors such as:
- Light and darkness
- Regular sleep and wake times
- Meal timing
- Physical activity
A healthy circadian rhythm typically promotes:
- Feeling sleepy in the evening
- Sleeping through most of the night
- Waking naturally in the morning
If you’re asking about difficulty staying asleep all night, I can also explain common causes and ways to improve sleep continuity.
