Why gravity intolerance may explain your health issues

Most doctors treat irritable bowel syndrome, chronic back pain, anxiety, and exhaustion as separate conditions. Dr. Brennan Spiegel, director of health services research at Cedars-Sinai Medical Center in Los Angeles, offers a different perspective: all of these problems may be different expressions of the same phenomenon, which he calls gravity intolerance.

What is gravity intolerance

Gravity has been here far longer than we have. Every cell in the body has evolved to manage it. When that system fails, whether through sedentary behavior, excess weight, chronic stress, or ultra-processed foods, the body begins to give in to that constant force. That is what Spiegel means by gravity intolerance.

The most common symptoms include:

• Chronic low back pain
• Digestive problems and irritable bowel syndrome
• Dizziness when standing up
• Chronic exhaustion
• Anxiety and a feeling of emotional heaviness
• Swollen ankles

Many of these symptoms share a physical cause: the body's pumping and tubing systems (circulation, lymph, intestine) work against gravity all day long. If the body is not strong and hydrated enough to maintain that effort, the systems begin to fail.

The connection between gravity and the gut

About 95% of the body's serotonin is produced in the gut, not the brain. This serotonin does not just regulate mood: it also activates muscle contractions, the lymphatic system, and the circulatory mechanisms that keep fluids moving upward against gravity.

Posture directly affects this function. When we slouch, the diaphragm drops, the abdomen compresses, and the intestine, which normally hangs suspended when we are upright, folds over. In people with joint hypermobility (those who can bend their pinky back past 90 degrees or touch their forearm with their thumb), the internal suspension cables are also stretchy, which makes digestive compression easier and promotes bacterial overgrowth and gas.

Strengthening the core and upper back opens the abdominal space and improves digestive function. Exercise is, in fact, the most effective therapy for IBS according to multiple randomized controlled trials, whether yoga, swimming, tai chi, or strength training.

Simple tests to measure your gravity tolerance

Spiegel proposes two self-assessments:

Single-leg balance

Stand on one leg for 10 seconds. Your ability to balance on a single leg measures the vestibular system, proprioception, and overall strength. Research shows that in older adults this test is directly predictive of life expectancy. If you struggle to do it, that is something to address urgently.

The dead hang

Hanging from a pull-up bar for one minute is the threshold for good gravity tolerance. Grip strength correlates with cardiovascular health and longevity across multiple cohort studies. The goal is to reach one minute; the world record exceeds one hour.

Tools to strengthen your relationship with gravity

• Weighted vest: Spiegel wears one almost every day at work. By adding extra weight, the body trains to manage greater gravitational force, and removing it leaves you feeling lighter and more agile.
• Yoga and inversions: downward dogs and inverted postures promote lymphatic drainage and temporarily shift your relationship with gravity.
• Adequate hydration: drinking 10 to 13 glasses of water per day is necessary to keep the circulatory systems flowing smoothly against gravity.
• Diaphragmatic breathing: two minutes of slow, deep breathing activates the vagus nerve, releases serotonin, and shifts the nervous system from alert to rest.

Foods that support gravity tolerance

Spiegel's STACK 10 protocol gathers ten tryptophan-rich foods, the precursor to serotonin: salmon, turkey, avocado, chicken, chickpeas, kidney beans, tempeh, tofu, eggs, and nuts. Serotonin does not only regulate mood: it also activates the muscles, lymph, and pumping systems that allow the body to stay upright. Including a variety of these foods each week is a direct way to support the system that manages gravity from the inside.

Conclusion

Shifting the health lens from treating isolated symptoms to strengthening the body's capacity to manage gravitational force opens concrete possibilities: moving more, hydrating better, building strength and posture. These are not changes that require major time or financial investment. They are the same habits we already know, seen from a different angle that makes them more urgent and more understandable.