How Gravity Shapes Your Body, Brain, and Health

Dave Asprey

Oct 2, 2025

Episode description

Gravity may be the most ignored signal in human biology, and it could be the missing key to unlocking fat loss, brain optimization, and true longevity. In this episode, you’ll learn how Earth’s pull shapes your metabolism, mood, and resilience, and discover practical hacks to fight “gravity intolerance” so you can perform better, live longer, and upgrade every system in your body.

Watch this episode on YouTube for the full video experience:

https://www.youtube.com/@DaveAspreyBPR

Host Dave Asprey sits down with Dr. Brennan Spiegel, a Professor of Medicine and Public Health at UCLA, Director of Health Services Research at Cedars-Sinai, and author of Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health. A leading voice in digital health and immersive medicine, Dr. Spiegel brings decades of clinical and research experience exploring the intersection of the gut-brain axis, neuropsychology, and mind-body medicine. In this episode, he reveals why gravity influences everything from gut health to depression — and why modern medicine has largely ignored its role. His work bridges functional medicine, neuroscience, and biohacking to uncover a hidden force that shapes human performance at every level.

You’ll Learn:

• Why gravity is the most ignored biohacking signal in human health

• How gravity intolerance shows up as back pain, fatigue, obesity, and depression

• The surprising connection between gravity, serotonin, and mood regulation

• How weighted vests, balance boards, and proprioception training hack graviception

• Why sleep optimization, posture, and fascia resilience are gravity-based health tools

• How Earth’s pull influences gut health, metabolism, and even consciousness

You’ll learn how gravity connects to obesity, back pain, blood pressure, serotonin, and even consciousness. Dave and Dr. Spiegel explore how weighted vests, balance boards, vibration, and sleep optimization can hack your body’s response to gravity.

This channel dives into mitochondria, neuroplasticity, fasting, ketosis, supplements, and how biohackers can apply these insights alongside tools like cold therapy, nootropics, and even Danger Coffee to build resilience and extend longevity.

Dave Asprey is a four-time New York Times bestselling author, founder of Bulletproof Coffee, and the father of biohacking. With over 1,000 interviews and 1 million monthly listeners, The Human Upgrade brings you the knowledge to take control of your biology, extend your longevity, and optimize every system in your body and mind. Each episode delivers cutting-edge insights in health, performance, neuroscience, supplements, nutrition, biohacking, emotional intelligence, and conscious living.

Mindsip insights from this episode:

Ditch padded shoes to strengthen your feet against gravity

Padded shoes prevent your feet from properly feeling the ground and using their natural trampoline-like fascia to propel you, which ultimately makes you weaker against gravity.

#footwear

#muscle

Sleep flat to enhance brain function and intelligence

The evolutionary shift from sleeping upright in trees to sleeping flat on the ground may have spurred human intelligence by allowing the brain to gravitationally reperfuse at night.

#cognition

#sleep

Utilize piezo channels to convert gravity into bioelectric signals

Specialized piezo channels in your cell membranes act as a conversion engine, translating the physical push and pull of gravity into the body's bioelectric signals.

#cells

Reframe common issues as gravity intolerance

Many common issues like low blood pressure, back pain, ankle swelling, and even depression can be viewed as forms of gravity intolerance.

#back-pain

#blood-pressure

Recognize interstitium as vital organ for health and disease management

The interstitium, the space between organs, was only recently identified as an organ and is vital for gravity tolerance, autoimmunity, and cancer spread.

#autoimmunity

#cancer

Simulate heavier gravity with weighted vests for deep fascial strength

Wearing a weighted vest and ankle weights all day for several weeks can build deep fascial strength by simulating life on a planet with stronger gravity.

#exercise

#strength

Wear compression gear to combat flying fatigue and brain fog

Wearing tight compression tights and a shirt while flying can replace the missing atmospheric pressure and reduce symptoms like brain fog and fatigue.

#biohacking

#travel

Understand serotonin's role in gravity management and psychedelic experiences

Serotonin is a gravity management substance that primes your vascular system to fight gravity, which is why psychedelics that flood the brain with serotonin make you feel 'high' or like you're floating.