Time Perception & Entrainment by Dopamine, Serotonin & Hormones | Huberman Lab Podcast #46

Circadian System

The circadian system is a fundamental aspect of our biology, influencing everything from hormone levels to mental health. Andrew Huberman emphasizes the importance of maintaining precise circadian entrainment to prevent health issues such as obesity and mental health disorders 1. He suggests regular exposure to sunlight and consistent meal timing as key strategies for aligning our internal clocks with the external environment 2.

Our perception of time is both conscious and influenced by slower oscillatory events related to day length, affecting hormones like melatonin, testosterone, and estrogen.

--- Andrew Huberman

Light exposure, particularly to the skin, plays a crucial role in this process, impacting hormone levels and overall well-being 3.

   

Ultradian Cycles

Ultradian rhythms, distinct from circadian rhythms, are approximately 90-minute cycles that govern our ability to focus and perform tasks. Huberman explains that these cycles can be intentionally initiated for work, allowing for periods of intense focus followed by necessary breaks 4. He advises limiting focused work sessions to one or two cycles per day to avoid mental fatigue 5.

The 90-minute time block is the one in which the brain can enter a state of focus and alertness and do hard work.

--- Andrew Huberman

Understanding and leveraging these ultradian cycles can enhance productivity and cognitive performance 6.