Redefining Nutrition and Fitness with Mark Sisson

In this episode of the Strong New York Podcast, Kenny takes the show on the road to the LA Fit Expo to sit down with health and wellness legend Mark Sisson.

Mark—New York Times bestselling author, former elite endurance athlete, and founder of Primal Kitchen—shares how injuries from running led him to rethink fitness, nutrition, and footwear, ultimately creating the Primal Blueprint and Primal Kitchen. He breaks down his simple framework for long-term health (diet, walking, lifting, sprinting, and sleep), explains why metabolic flexibility matters, and challenges mainstream nutrition “science.”

We also dive into entrepreneurship, lessons learned building iconic brands, and why Mark launched his minimalist footwear company Peluva to address foot health from the ground up.

00:00 Live from LA Fit Expo: Welcome & Why Fitness Events Matter

00:26 Meet Mark Sisson: Athlete, Entrepreneur & Early Biohacker

01:25 From Running Injuries to Evolutionary Biology (and Building a Career)

02:17 Primal Kitchen Origin Story: Fixing Diet Through Better Sauces

03:33 Facing Rejection: Defending Paleo, Epigenetics & Self-Experimentation

05:55 Science, Money & Nutrition Confusion: Why Mark Stays Non-Dogmatic

07:29 Try Things, Track Results: Awareness, Experimentation & What You’ll Stick To

09:33 Metabolic Flexibility: The Real Goal Behind Any “Best Diet”

10:35 80/20 Fitness Basics: Walk More, Lift, Sprint—Then Decide How Far to Go

11:43 Born to Walk: Why Most People Shouldn’t Run (Injuries, Form & Catabolism)

14:07 Runner’s High Myth & Smarter Training: Cross-Training Over Mileage

16:12 VO2 Max vs Real-World Longevity: Build a Strong, Balanced Hybrid Athlete

17:19 Whatever Happened to America’s Fitness Culture? Setting Up the Bigger Question

17:47 Why We’ve Gotten Softer: Screens, PE, and “Trauma” from Gym Class

18:40 Building Big Businesses: Choosing the Right Idea & Betting on Yourself

20:18 Purpose Over Profit: Mission-Driven Entrepreneurship (Sauces to Footwear)

22:02 Failures That Built the Empire: Pivots, Lessons, and Mark’s Origin Story

23:08 3 Business Non-Negotiables: Team, Capital, and Timing (Plus the Keto/Atkins Lesson)

25:31 The Simple Health Stack: Diet First, Walk More, Lift & Sprint, Then Sleep

26:51 Sprinting Done Right: Intervals, Examples, and Avoiding Injury

28:15 When Endurance Backfires: Overtraining, Heart Health, and How Humans Really Moved

32:28 Training Smarter at 72 + Where to Find Mark (Wrap-Up)