How Dolphins are Programmed to Get Poor Sleep

Read more about chronotypes by visiting The Sleep Doctor:

There is nothing more predictive of our sleep schedules and productivity than our chronotype. We usually think about these in terms like “night owl” or “early bird.”

However, Dr. Michael Breus has identified FOUR major chronotypes: the Bear, Dolphin, Lion, and Wolf. In this video, Dr. Breus explains what sets Dolphins apart from the other chronotypes, and how to best structure your days and nights to maximize your sleep AND your productivity.

To learn which chronotype you might be, take our Chronotype Quiz at

0:00 What is a Chronotype?
0:50 What is a Dolphin?
1:36 How to Get the Most out of Being a Dolphin
2:47 Your Chronotype Can Change!


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About the Author: Joy Packard


  1. All very interesting, but the scientific studies demonstrating these divisions between dolphins, bears, etc…
    Where can I find them? Can I read them?
    Thank you in advance doctor, if you answer me

  2. I’m at dolphin there’s no way I can be in bed by midnight I’m in bed at 9:30 10:00 because I am so exhausted no matter what time I go to bed I’m up throughout the night no matter what time I go to bed I’m up throughout the night going to bed at 9:30 10:00 is healthier for my body than going to bed at midnight

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