There Is a Pharmacy Built Into Your Muscles. It Has One Rule: No Contraction, No Prescriptions. episode artwork

EPISODE · Aug 15, 2026 · 26 MIN

There Is a Pharmacy Built Into Your Muscles. It Has One Rule: No Contraction, No Prescriptions.

from The Habit Healers · host Laurie Marbas, MD, MBA

Your muscles are an endocrine organ. Every time they contract, they release myokines, chemical signals that travel to your brain, your bones, your fat cells, your gut, and your immune system. Most of us were never told this, and it explains why you can walk thirty minutes a day for three years and still watch your bone density fall and your inflammatory markers drift upward.In this episode, I walk you through the eight organs that receive signals from contracting muscle, and what happens to each one when the signal stops. We talk about why myokine release is contraction dependent, which means a large muscle sitting in a chair all day sends nothing at all. I explain why interleukin-6 released from working muscle behaves like a completely different molecule than the IL-6 you may have read about as an inflammatory marker. Then I give you the schedule itself: five movement days a week, one long walk, interval walking sessions, two resistance sessions for bone, and breaking up prolonged sitting.What you’ll learn:* What myokines are and why skeletal muscle functions as an endocrine organ* Why walking alone may not protect bone density, and which chemical signals actually build bone* How muscle contraction triggers natural GLP-1 release, the same hormone targeted by the new weight loss drugs* Why interval walking training outperforms continuous walking at matched energy expenditure* How exercise lowers chronic inflammation by suppressing TNF and raising anti-inflammatory signals* Why the number of days you move matters more than your total weekly exercise minutesDr. Marbas Substack Article: https://drlauriemarbas.substack.com/p/there-is-a-pharmacy-built-into-yourCheck out the Habit Healers Community: https://www.skool.com/habithealers/about Get full access to The Habit Healers at drlauriemarbas.substack.com/subscribe

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There Is a Pharmacy Built Into Your Muscles. It Has One Rule: No Contraction, No Prescriptions.

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