Muscle: The Overlooked Organ of Longevity

Discover why muscle is called the “organ of longevity” and how strength supports health, resilience, immunity, pregnancy, and postpartum recovery.

So, I’ve been recently inspired and fascinated by Dr. Gabrielle Lyon’s work in Muscle Centric Medicine. I’ve been captivated by the statement that muscle is the organ of longevity. Most of us think of organs like the heart, lungs, or brain as vital, while muscle feels like a secondary external display of regular gym activity and strength with nothing more to offer. But the more I study and observe, the more I realize just how necessary muscle is for the body to function properly.

Why Muscle Matters So Much

Muscle is far more than “extra padding” for strength or aesthetics. Here are just some of the ways it supports the body:

• Metabolic health: Muscle tissue acts as a glucose sink, meaning it holds on to excess glucose from the blood, and it helps to regulate blood sugar and reduce the risk of insulin resistance and type 2 diabetes.
• Hormonal balance: Healthy muscle supports hormone regulation, including insulin, cortisol, and sex hormones. (In fact, Dr. Lyon says muscle is actually an endocrine organ because of this function! That blew my mind!)
• Mobility and independence: Later in life, the difference between staying active or becoming frail often comes down to whether someone has maintained their muscle.
• Inflammation control: Contracting muscle releases myokines, signaling molecules that reduce inflammation and support whole-body healing.
• Immune system support: Here’s what fascinated me recently. Muscle acts like a “savings account” that the immune system can draw on in times of need; when life hits, you’re glad it’s there. When we’re sick, fighting an infection, or even recovering from injury, the immune system relies on amino acids stored in muscle to mount a defense and repair tissues. Without adequate muscle, the body literally has less capacity to fight and recover.

When you look at it this way, muscle isn’t just about being able to lift weights or carry groceries. It’s a whole-body support system for energy, immunity, and longevity.

Muscle is active, living tissue with profound effects on our health.

Why Fitness Gets Overlooked

Despite this, fitness is often the least emphasized part of health conversations. We tend to talk about food, supplements, or medical interventions first. Movement and strength get sidelined, especially for women, who have historically been told to focus on “eating less” instead of fueling and strengthening their bodies. (The more I learn about the importance of nutrition in hormone regulation, the more this breaks my heart.)

This leaves many people walking around under-muscled, which puts them at higher risk for fatigue, chronic illness, and loss of resilience when life throws them a curveball.

Implications for Pregnancy and Postpartum

For women, the conversation around muscle becomes especially important during pregnancy and postpartum.

• Pregnancy: Building and maintaining muscle before and during pregnancy supports stability for a changing body, improves blood sugar control, and helps reduce the risk of gestational diabetes. Strength also contributes to stamina during labor and resilience in recovery.

• Postpartum: After birth, many women experience rapid muscle deconditioning due to hormonal shifts, physical healing, and the demands of newborn care. Rebuilding muscle is essential not just for “getting your body back,” but for healing the core and pelvic floor, restoring energy, and supporting long-term bone health (since muscle and bone are so closely connected). In early postpartum, very gentle core work (very gentle) helps to “remind” those muscles how they’re supposed to function again and sets the stage for further muscle recovery down the road.

• Immune resilience: Pregnancy and postpartum both place added demands on the immune system. Having healthy muscle reserves gives the body more resources to fight infection and bounce back from the stress of birth.

• Lifelong vitality: The years of childbearing and postpartum recovery are pivotal. Investing in strength during these seasons doesn’t just make daily life easier; it sets the stage for healthy aging.

A Shift in Perspective

This perspective reframes exercise from being about “burning calories” to being about building longevity. Every time we squat, carry, push, pull, or stretch, we’re sending a clear signal to our bodies: stay strong, stay capable, stay alive.

For me, this isn’t about perfection or intensity. It’s about consistency. Walking, lifting, bodyweight movements, mobility work—it all matters. And the best part? You don’t need a gym membership or fancy equipment to begin.

Practical Sidebar: 5 Simple Ways to Build Strength (Pregnant or Postpartum-Friendly)

1. Sit-to-Stands: Practice standing up from a chair without using your hands. This is a functional squat and builds leg strength for daily life.

2. Carrying Loads: Carry groceries or your baby in a car seat as a form of “loaded carry.” This mimics farmer’s carries and strengthens grip, core, and shoulders.

3. Gentle Core & Pelvic Floor Work: Incorporate breathing-based core engagement (like diaphragmatic breathing and pelvic tilts) to reconnect to your deep stabilizers after birth.

4. Bodyweight Push-Ups (Wall or Countertop): These build upper body strength without requiring you to get on the floor if you’re newly postpartum.

5. Walking with Intention: Walking is underrated! Add intervals (walk briskly for 1–2 minutes, then slow down) to build endurance and cardiovascular health while also engaging muscles.

(Tip: Always check with your provider before starting new exercises during pregnancy or postpartum recovery.)

Final Thoughts

If muscle really is the organ of longevity, then fitness deserves a front-row seat in our health conversations—right alongside nutrition, sleep, and stress management. Especially for women in pregnancy and postpartum seasons, prioritizing strength is one of the most loving investments you can make in your future self.