Circadian Rhythm

Circadian Rhythm refers to the body's natural 24-hour cycle that regulates sleep, wakefulness, and other physiological processes.

Core Components

Sleep-Wake Cycle

Sleep timing
Wakefulness periods
Light exposure

Biological Processes

Hormone regulation
Body temperature
Metabolic functions

Environmental Influences

Light and darkness
Meal timing
Activity levels

Circadian timing and accumulated sleep need interact. This conceptual diagram separates the clock from sleep pressure; it does not predict a person's hormone levels, bedtime or response to a particular light dose. Original conceptual diagram based on National Heart, Lung, and Blood Institute, How Sleep Works: Your Sleep/Wake Cycle.

Application

Sleep Optimization
- Consistent sleep schedule
- Light management
- Relaxation techniques
Health and Wellness
- Energy management
- Mood regulation
- Cognitive function

Best Practices

Maintain regularity
Limit screen time
Prioritize sleep