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title: Chronotype
modified: 2026-08-03
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= 生理時型

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# What is Chronotype?

Chronotype refers to your natural preference for [sleep](sleep.md) and activity times. It determines when you’re most alert and energetic during the day. It’s influenced by your internal [circadian rhythm](circadian-rhythm.md) and largely shaped by genetics.

In simple terms, chronotype tells you: **“What kind of internal clock person are you?”**

# 4 Common Chronotypes (Animal Types)

These are based on Dr. Michael Breus’s book _The Power of When_:

| Chronotype | Peak Productivity Time          | Traits                                                      |
| ---------- | ------------------------------- | ----------------------------------------------------------- |
| 🐻 Bear    | 9:00–17:00 (daytime)            | Most people fall here; energy rises and falls with the sun. |
| 🦁 Lion    | 6:00–14:00 (early morning)      | Early risers; energized in the morning, fade by evening.    |
| 🐺 Wolf    | 13:00–21:00 (afternoon/evening) | Night owls; slow starters, peak later in the day.           |
| 🐬 Dolphin | Unpredictable                   | Light sleepers, easily disturbed, irregular energy.         |

> Morning lark (雲雀；百靈鳥) ↔ Night owl (貓頭鷹)

# Why Knowing Your Chronotype Helps

* **Smarter scheduling:** [Tackle hard tasks when you’re naturally most alert.](eat-the-biggest-frog-first-thing-in-the-morning.md)
* **Avoid energy mismatches:** Night owls should avoid deep work early in the morning.

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[Work in sprints, work with your biology](work-in-sprints-work-with-your-biology.md)