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 ## Application 1. **Sleep Optimization** - Consistent sleep schedule - Light management - Relaxation techniques 2. **Health and Wellness** - Energy management - Mood regulation - Cognitive function ## Best Practices - Maintain regularity - Limit screen time - Prioritize sleep