Welcome back to the WOOP podcast, where we sit down with top athletes, researchers, scientists, and thought leaders to learn what the best in the world are doing to perform at their peak and what you can do to unlock your own best performance.

I'm Kristen Holmes, VP of Performance at Woop, and we are on a mission to unlock human performance.

On this week's episode, we're going deep on your circadian rhythm and how light exposure affects

your body. I sit down with Dr. Sammer Hattar, a world-renowned expert in the field of non-image

forming photoreception, or how light affects circadian rhythms, sleep, mood, learning, stress, and hormone

levels. Light has an enormous impact on performance levels. Dr. Hattar is credited with discovering

neurons in the eye that set our circadian clocks and regulate mood and appetite, which was a

groundbreaking discovery in the field of circadian health. Dr. Hattar

and I discuss what the consequences are if you view light at the wrong time, the importance of light

exposure in the morning, how light exposure can affect our next day mood and behavior, synchronizing

eating windows and meal timing with our internal clocks and how disruption of the

circadian rhythm has significant influences on exercise function. Knowing how important circadian

alignment is to your overall health, we've added the ability to track circadian health

questions in the WOOP journal. Check them out in the Woop app and get tracking today. We also have an exciting new offer for WOOP podcast listeners.

If you're a new member signing up for WOOP, use the code will, all caps, WI-L, when you're checking out to get a $60 credit on WOOP accessories.

That includes bands, battery packs, and our

Woop Body Apparel. Head to join.Woop.com to get started. And now here's our discussion

with Dr. Samra Hattar. So honored to welcome chronobiologist and the chief of the

section on light and circadian rhythms at the National Institute of Health,

Dr. Samra Hattar.

Dr. Hedar is a world-renowned expert on how light affects circadian rhythms,

and his discoveries have helped us to better understand how the relationship between

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