# The Science Of How To Fall Asleep Quickly - Andrew Huberman Source: https://www.youtube.com/watch?v=CGC4gp79oI0 Recap page: https://rapidrecap.app/video/CGC4gp79oI0 Generated: 2025-12-30T17:01:49.679+00:00 --- ## Quick Overview Andrew Huberman suggests that people struggling to fall asleep quickly, especially those on low-carb diets or who are generally health-conscious, should focus on gently rocking their body or eyes in slow, alternating directions (counter-clockwise then clockwise, or vice versa) just before sleep, as this movement helps the vestibular system communicate with the cerebellum to signal the body to calm down, effectively countering the racing mind often caused by high cortisol levels or lack of glucose/carbohydrate intake late in the day. **Key Points:** - People struggling to fall asleep, particularly those on low-carb or keto diets, often have elevated baseline cortisol levels. - The recommended technique involves gently rocking the eyes slowly from side to side (counter-clockwise then clockwise) just before sleep. - This eye movement engages the vestibular system, which communicates with the cerebellum to signal the body to calm down, compensating for the lack of glucose/carbohydrate spike often needed for relaxation. - The speaker notes that this method is particularly helpful because the vestibular system has an inherent asymmetry, meaning rocking in one direction and then the other sends opposing signals that help transition the body into a resting state. - For those who struggle with a racing mind at night, this technique provides a cognitive task that helps override the overactive sympathetic nervous system. - The speaker also mentions that adequate hydration/electrolytes (like those in LMNT) and avoiding late-day starchy carbs are crucial for maintaining healthy cortisol levels conducive to sleep. ![Screenshot at 07:18: Huberman instructs the listener to close their eyes and perform slow, alternating eye movements \(counter-clockwise then clockwise\) to engage the vestibular system and induce calmness before sleep.](https://ss.rapidrecap.app/screens/CGC4gp79oI0/00-07-18.jpg) **Context:** This segment features Andrew Huberman discussing practical, science-backed methods for improving sleep onset latency, specifically addressing issues commonly faced by individuals following restrictive diets like ketogenic or very low-carbohydrate diets. He links difficulty sleeping to elevated evening cortisol levels and discusses how specific physical movements, rather than just trying to stop thinking, can actively calm the nervous system. ## Detailed Analysis Andrew Huberman addresses the difficulty people have falling asleep quickly, noting that this is often exacerbated for those on very low-carbohydrate or ketogenic diets because their evening meals lack the starchy carbohydrates that can suppress cortisol. Elevated cortisol levels keep the body wired, making sleep difficult. Huberman suggests a technique involving gentle, slow eye movements just before bed. Specifically, he recommends closing the eyes and moving them slowly in a counter-clockwise circle, then slowly in a clockwise circle, and repeating. He explains that this movement engages the vestibular system, which communicates with the cerebellum. This process helps send opposing signals to the brain, effectively overriding the overactive sympathetic nervous system and body awareness (proprioception) that prevents relaxation. He contrasts this with the ineffective strategy of simply telling oneself to stop thinking. Furthermore, he advises reviewing one's nutrition—ensuring sufficient electrolytes (mentioning LMNT) and avoiding starchy carbohydrates late in the day—as poor nutrition can keep cortisol elevated, thus making sleep harder. He emphasizes that this gentle rocking/eye movement is a powerful, research-backed tool for inducing sleep, especially when the mind is racing. ### Sleep Onset Techniques - Gently rocking the body or eyes slowly in alternating directions (counter-clockwise then clockwise) before sleep helps calm the nervous system - This movement engages the vestibular system, which signals the cerebellum to reduce alertness. - This technique works well for those with racing minds or high evening cortisol. ### Dietary Factors Affecting Sleep - People on low-carb/keto diets often have higher baseline cortisol, making sleep difficult - Consuming starchy carbohydrates 2-3 hours before bed can help suppress this cortisol spike and aid sleep. - Adequate hydration and sufficient electrolytes are also critical for overall system regulation. ### Cortisol Management - Cortisol's primary role is to mobilize energy (glucose) for the brain under stress conditions. - Low carbohydrate intake means the body must mobilize glucose from stored sources, which keeps cortisol slightly higher than normal throughout the day and evening. - Normalizing the cortisol curve through diet and movement helps achieve better sleep. ![Screenshot at 00:06: Huberman begins explaining strategies for people struggling to fall asleep, using hand gestures to emphasize his points.](https://ss.rapidrecap.app/screens/CGC4gp79oI0/00-00-06.jpg) ![Screenshot at 00:47: Huberman explains that people on very low-carb diets often struggle with sleep because their cortisol levels are high.](https://ss.rapidrecap.app/screens/CGC4gp79oI0/00-00-47.jpg) ![Screenshot at 01:16: The speaker holds up an LMNT electrolyte packet while discussing the importance of proper hydration and electrolyte balance for sleep.](https://ss.rapidrecap.app/screens/CGC4gp79oI0/00-01-16.jpg) ![Screenshot at 04:06: Huberman demonstrates the eye-rocking motion, illustrating how the vestibular system is engaged.](https://ss.rapidrecap.app/screens/CGC4gp79oI0/00-04-06.jpg) ![Screenshot at 09:04: The host transitions to an advertisement segment, holding up an LMNT product box and stick packet.](https://ss.rapidrecap.app/screens/CGC4gp79oI0/00-09-04.jpg)