2822: The Truth About Insulin Sensitivity & Muscle Growth

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Mar 26, 2026

Dr. Rhett Langley, a physician focused on metabolic and sexual health who runs a clinic and advises NutriSense. He discusses how insulin sensitivity and blood sugar shape cravings, energy, and muscle growth. Strength training, sleep, and lifestyle beat pills alone. Continuous glucose monitors reveal surprising individualized responses and help change behavior.

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ADVICE

Combine GLP-1s With Coaching Not Alone

Use GLP-1s as 'chemical boot camp' to reduce appetite and improve insulin sensitivity, but pair with structured coaching.
Rhett warns GLP-1s make overeating aversive and work best alongside behavioral programs.

INSIGHT

Blood Flow Links Sexual Function And Heart Health

Improving vascular function (e.g., with PDE5 inhibitors) supports organ perfusion and ties directly to sexual and cardiovascular health.
Rhett emphasizes blood flow as a common path between erectile dysfunction and heart disease.

INSIGHT

Metabolic Disease Drives Widespread Sexual Dysfunction

Metabolic dysfunction dramatically raises sexual dysfunction rates in both men and women and responds to lifestyle programs.
The Look AHEAD trial showed structured weight intervention put 30% of affected women into remission from sexual dysfunction.

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Most people think building muscle and burning fat comes down to calories, workouts, and discipline.

But what if the real issue is something deeper?

In this episode, we sit down with a Rhett Langley, specializing in metabolic health to break down why your body might not be responding , even when you're doing everything right.

We cover:

Why metabolism controls fat loss and muscle gain
How blood sugar impacts cravings, energy, and performance
The truth about insulin sensitivity and muscle growth
Why strength training is one of the most powerful metabolic tools
How sleep, stress, and lifestyle affect your results more than you think
The real reason some people struggle to see progress

If you feel stuck, frustrated, or like your body isn't responding… this episode will change how you look at fitness.

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(00:00) Metabolic Health & Why It Matters (11:00) The Doctor's Personal Wake-Up Call (20:00) Stress, Blood Sugar & Daily Lifestyle Impact (30:00) Why Muscle Improves Insulin Sensitivity (40:00) Metabolic Dysfunction & Sexual Health (50:00) How CGMs Help Change Behavior (01:00:00) The Biggest Levers: Training & Nutrition (01:10:00) Why Strength Training Beats Cardio for Metabolism (01:20:00) Brain Health, Dementia & Blood Sugar (01:30:00) GLP-1s, Medications & Fat Loss (01:40:00) Supplements That Actually Work (01:50:00) How to Fix Your Metabolism Long-Term