免费昼夜节律计算器
了解您的昼夜节律周期，优化作息时间表。
hour
Optimal Wake Time
7.0 hour
Peak Alertness9.5 hour
Afternoon Energy Dip14.0 hour
Optimal Bedtime23.0 hour
Melatonin Onset21.0 hour
Optimal Wake Time vs Natural Wake Time (24h)
公式
Circadian Rhythm Timing
Your circadian rhythm is an internal 24-hour clock that regulates sleep, alertness, and hormone release.
Key Time Points (Relative to Wake)
Chronotypes
计算示例
An intermediate chronotype who naturally wakes at 7 AM.
- 01Optimal wake = 7:00 AM
- 02Peak alertness = 9:30 AM
- 03Afternoon dip = 2:00 PM
- 04Melatonin onset = 9:00 PM
- 05Optimal bedtime = 11:00 PM
常见问题
What is a chronotype?
Your chronotype is your biological tendency toward being a morning person (lark) or evening person (owl). It is largely genetic and shifts with age.
When is the best time to exercise?
Body temperature peaks in late afternoon (about 10 hours after waking), making it ideal for physical performance. Morning exercise can help reset circadian rhythm.
Can I change my chronotype?
You cannot fully change your genetic chronotype, but you can shift your schedule with consistent light exposure, meal timing, and sleep hygiene.
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