#443 Stefan Gehrig - From Studying Muscle Wasting Disorders to Making The Best Gym Bags In The World

#443 Stefan Gehrig - From Studying Muscle Wasting Disorders to Making The Best Gym Bags In The World

Author: Andrew Coates February 14, 2026 Duration: 34:42

Please enjoy this rare bonus Saturday episode with Stefan Gehrig, founder of KNKG - my favourite gym bag and duffel company.


Stefan also holds a PhD in Muscle Biology and worked in research studying muscle wasting disorders before pivoting into entrepreneurship. While he no longer works directly in academia, I didn’t want to miss the opportunity to ask valuable questions about his expertise in muscular dystrophy, sarcopenia, and other muscle-wasting conditions.


We also discuss the leap from research to building one of the most respected gym bag brands in the world - and what it takes to go all-in on a side hustle.


THIS EPISODE COVERS:


The story behind founding KNKG


Pivoting from academic research to entrepreneurship


What went into deciding to go all-in on a side hustle


What muscular dystrophy is and who is at risk


Other muscle wasting diseases and their individual and societal impact


How lifestyle affects muscle health and disease risk


Sarcopenia and age-related muscle loss


Why strength training matters for long-term health


Neurological conditions like ALS and MS and their connection to muscle wasting


Applying scientific thinking to business


And much more


We’ll both be at the Arnold Sports Festival March 6th and 7th at the KNKG booth — come say hello.


If you’d like to grab your own KNKG bag, DM me and I’ll send you my 15 percent discount code.


Instagram: @knkg


CHAPTERS


00:16 Meet Stefan Gehrig: KNKG founder, PhD, CrossFit Games athlete

01:09 How Andrew became a KNKG superfan (Arnold booth announcement)

02:23 KNKG’s origin story: from PhD research to building bags since 2011

04:09 From scientist to founder: CrossFit niche + The 4-Hour Workweek spark

05:30 Designing without experience: materials, factories, and manufacturing

06:21 What was missing in gym bags: organization, shoe compartments, function

08:02 The leap: leaving academia and going all-in on KNKG

10:22 Why it worked: timing, runway, and applying the scientific method to business

12:27 Arnold Sports Festival + 15% discount details

13:38 The 80/20 of KNKG: product development, word-of-mouth, long lead times

15:44 Muscular dystrophy explained (Duchenne, risks, treatments)

19:07 Staying current in research — and why science is all-consuming

20:28 Sarcopenia: age-related muscle loss and why strength training matters

25:23 Training for life: resistance + cardio, hybrid programming

28:18 ALS & MS: neurological causes of muscle wasting

31:01 See you at the Arnold: booth details

32:12 Wrap-up: where to follow KNKG


SUPPORT THE SHOW


If you enjoyed this bonus episode, you can support the show by:


Subscribing and checking out more episodes


Sharing it on social media (tag me — I will respond)


Sending it to someone interested in entrepreneurship or muscle health


FOLLOW ANDREW COATES


Instagram: @andrewcoatesfitness

https://www.andrewcoatesfitness.com


PARTNERS AND RESOURCES


RP Strength App (use code COATESRP)

https://www.rpstrength.com/coates


Just Bite Me Meals (use code ANDREWCOATESFITNESS for 10 percent off)

https://justbitememeals.com/


MacrosFirst – FREE Premium Trial

Download MacrosFirst

During setup, answer: How did you hear about us?

Type: ANDREW


KNKG Bags (15 percent off — DM for code)


Versa Gripps (discount link)

https://www.versagripps.com/andrewcoates


TRAINHEROIC – FREE 90 Day Trial (2 steps)

Go to: https://www.trainheroic.com/liftfree


Reply to the email you receive (or email trials@trainheroic.com

) and let them know Andrew sent you


Andrew Coates hosts Lift Free And Diet Hard, a conversation grounded in the belief that strength and wellness are built on more than just routines. This podcast moves beyond quick fixes to examine the principles and personal stories that shape a sustainable, intentional life. You’ll hear from a variety of inspiring guests who share not only their expertise but also the real-world challenges and triumphs they’ve faced. The discussions naturally weave together the science of fitness with the practicalities of daily choices, offering a nuanced look at what it means to truly care for your physical and mental health. Each episode is designed to provide actionable insights you can use to navigate your own path, fostering resilience and confidence whether you're in the gym or the kitchen. By focusing on informed decision-making over dogma, the Lift Free And Diet Hard podcast becomes a resource for anyone looking to cut through the noise of wellness culture. Andrew facilitates these explorations with a focus on empowerment, ensuring every conversation adds a layer of understanding to the complex journey of building a strong, healthy life.
Author: Language: English Episodes: 100

Lift Free And Diet Hard with Andrew Coates
Podcast Episodes
#381 Dr. Eric Helms - How Much Muscle Can The "Average" Person Build? [not-audio_url] [/not-audio_url]

Duration: 1:20:36
Dr Eric Helms is one of the most respected and influential educators in muscle building training and nutrition. Eric guests with detailed and nuanced answers about:-How much muscle can the average person expect to build…
#379 Amanda Thebe - Menopause Masterclass [not-audio_url] [/not-audio_url]

Duration: 1:02:18
Amanda Thebe is one of the most trusted voices in menopause advocacy and education. Amanda guests to take a blowtorch to the exploding volume of menopause misinformation online. Amanda shares:-How her strength training m…
#378 Brad Dieter - How to Lose Excess Weight and Keep It Off [not-audio_url] [/not-audio_url]

Duration: 54:02
Brad Dieter is the Chief Operating Officer and Co-Owner of Macros Inc.Brad shares his expertise on:-What years of client data suggests about the people who lose the excess weight and keep it off are doing to be successfu…
#377 Jeb Stuart Johnston - How To Build Emotional Eating Skills [not-audio_url] [/not-audio_url]

Duration: 1:09:10
Jeb Stuart Johnston specializes in working with people who struggle with emotional eating. Jeb joins me to share:-Understanding emotional eating and why its a significant driver of our obesity crisis-Important skills for…
#376 Tim Riley - How to Create Success In Sports and Life [not-audio_url] [/not-audio_url]

Duration: 1:11:49
Tim Riley is a strength and conditioning coach and host of the Coach Em Up Podcast. Tim joins to share his thoughts and wisdom about:-How important fitness was in leaving behind a past involving drugs and alcohol-How to…
#375 Lavanya Krishnan - How To Maintain Your Fitness When Travelling [not-audio_url] [/not-audio_url]

Duration: 51:06
Lavanya Krishnan is a personal trainer with a Masters Degree in public health, who travels the world extensively. Lavanya shares:-Why she doesn’t compromise on her fitness when she travels-How to plan ahead to include st…
#374 Ava Cowan - Lessons and Risk of Fitness Competition Dieting [not-audio_url] [/not-audio_url]

Duration: 52:29
Ava Cowan is a legendary Pro Figure Champion and Coach who’s appeared on the cover of over 20 fitness magazines.Ava joins me to share:-When do fitness competition diets become dangerous-What are the red flag behaviours t…
#373 Stan Efferding - Practical Nutrition Masterclass [not-audio_url] [/not-audio_url]

Duration: 1:25:20
Legendary powerlifter and IFBB Pro bodybuilder Stan Efferding is also one of the most thoughtful practitioners of evidence based nutrition and training. Stan joins for a pure masterclass in:-Why we have an obesity and me…