Glossary / Circadian Rhythm

Circadian Rhythm

A roughly 24-hour cycle of biological processes.

Drives sleep, hormone release, body temperature, and cognitive performance. Most people peak cognitively mid-morning.

Related

• Ultradian Rhythm — Recurring 90-120 minute cycles of physiological arousal during the day.
• Chronotype — Your individual circadian preference for sleep and peak performance.

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More from the glossary

• Pomodoro Technique
• Flowtime Technique
• Deep Work
• Shallow Work
• Flow State
• Ultradian Rhythm
• Chronotype
• Default Mode Network
• Diffuse Thinking
• Focused Thinking