Michael Breus
Dr. Michael Breus, Ph.D., is a board-certified sleep specialist located in Los Angeles, who has contributed significantly to the field of sleep medicine. He is renowned for introducing the concept of four distinct sleep chronotypes—Bear, Wolf, Lion, and Dolphin—based on sleep-wake patterns observed in animals. His work emphasizes the importance of aligning daily activities with one’s chronotype to enhance sleep quality and overall well-being.
Not in the pool (under ¢1).
Recent news mentions
Michael Breus is a psychologist and founder of SleepDoctor.com.
Do you know how often to replace your sponge? How about your mattress?
Australia· 2026-03-02
Michael Breus is a sleep expert and founder of SleepDoctor.com who emphasizes the importance of choosing the right pillow for quality sleep.
Dificuldade para dormir? Seu travesseiro pode ser o problema
Liechtenstein· 2025-02-28
Dr. Michael Breus, Ph.D., a board-certified sleep specialist in Los Angeles, first introduced the four chronotypes based on sleep-wake patterns seen in certain animals.
Knowing your sleep chronotype can lead to better rest and health
United States· 2025-02-23
