Cliff Wilson is a physique coach with over 16 years of experience working with bodybuilders and physique athletes of every level, including 24 world champions and the current natural bodybuilding world champion.

Getting better doesn’t make hard things feel easier—it makes you capable of doing more. Cliff Wilson explains the mental skills behind elite physiques, why context beats internet absolutes, and how great coaches turn research, experience, and failure into better decisions.

Expect to learn why impulse control makes up 20–50% of physique coaching, why you have to learn to dribble before you try to dunk, why practitioners and social media commentators are not the same thing, why getting fitter never makes a true max effort feel easier, how context (not absolutes) explains wildly different carb intakes between world-class physique athletes, why most advanced bodybuilders eventually land back on a bro split, and what separates “collectors” of credentials from coaches who can actually integrate and apply what they know—and much more.

Connect with Cliff:
teamwilsonbb.com (book: Becoming Unrivaled)
Instagram: @cwteamwilson
Raw Intensity app (mentioned in the episode)

Episodes you'll enjoy next:
#323 — Natural vs. Enhanced Bodybuilding: An In-Depth Chat with Aaron Straker: https://flex-diet-podcast.simplecast.com/episodes/episode-323-natural-vs-enhanced-bodybuilding-an-in-depth-chat-with-aaron-straker
#167 — The Physiologic and Psychologic Benefit of Doing Hard Things: Akshay Nanavati of Fearvana: https://flex-diet-podcast.simplecast.com/episodes/episode-167-the-physiologic-and-psychologic-benefit-of-doing-hard-things-akshay-nanavati-of-fearvana-with-dr-mike-t-nelson

Episode Timestamps:

• 02:15 — The edited interview begins and Mike explains the unusual opening
• 02:49 — Why 20–50% of physique coaching is impulse control
• 05:19 — Skill levels: learn to dribble before trying to dunk
• 07:37 — Practitioners vs. social media commentators
• 10:45 — Why you cannot sidestep the hard parts of fat loss
• 12:44 — Getting fitter does not make a true max effort feel easier
• 14:04 — Context beats absolutes: 700 grams vs. 50 grams of carbs
• 19:26 — Slow thinking, pondering, and turning information into insight
• 21:57 — Giving clients autonomy dramatically improved results
• 25:18 — Range, cross-domain learning, and better problem-solving
• 27:03 — Using OODA loops to make better coaching decisions
• 28:24 — Why most advanced bodybuilders return to a bro split
• 31:42 — Low-volume training, outliers, and small-sample traps
• 44:01 — A surprising DNA result and the role of elite genetics
• 48:31 — Michael Phelps, elite rituals, and competitive mindset
• 50:43 — Why bodybuilding coaching skill may have declined
• 53:11 — Objectivity, Austin Stout, and the traits of great coaches
• 01:03:14 — Collectors vs. integrators: credentials are not application
• 01:08:07 — Cliff's Raw Intensity app and upcoming book Becoming Unrivaled

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

Rick Collins, Esq., NSCA-CSCS, is a lawyer who defends the nutrition and fitness community, a partner at Collins Gann McCloskey & Barry PLLC, and General Counsel to the International Society of Sports Nutrition.

Peptides are everywhere right now, but most of what's sold online as BPC-157 or TB-500 is illegal — and the FDA is about to decide what happens next. Rick breaks down the science, the legal gray market, and why the military's new testosterone screening policy matters too.

Expect to learn what actually counts as a "peptide," how GLP-1 drugs normalized injectable medications and fueled the gray market, what the FDA's own scientists concluded about BPC-157 and TB-500, why Rick's caseload has shifted from steroids to 80-90% peptide cases, what a possible "experimental peptide" middle-ground category could look like, and what really happens when the FDA raids a peptide seller, and much more.

Connect with Rick:
www.RickCollins.com

Episodes you'll enjoy next:
#371 — Peptides, TRT, GLPs & Bloodwork: How to Do It Safely (and What Most People Miss) with John Gorman: Listen here
#319 — Exploring the World of Peptides with Anthony Castore: Listen here

Episode Timestamps:
4:07 Rick's background as a lawyer and his standard legal disclaimer
6:14 What actually counts as a "peptide"
8:25 How GLP-1 drugs normalized injectable medications
10:44 Loss of trust in the FDA fuels the gray market
11:46 The rise of personal health autonomy
13:40 Two markets: the medical model vs. "bro science"
16:23 Inside the FDA Compounding Advisory Committee meeting
19:23 FDA scientists' verdict on BPC-157 and TB-500
20:49 Why the science on BPC-157 is still so thin
22:07 Prohibition logic: the black market will keep growing
25:47 A possible middle ground: an "experimental peptide" category
32:11 Rick's caseload shift — from steroids to 80-90% peptide cases
35:30 Why big pharma cares about tirzepatide and retatrutide knockoffs
42:28 Pete Hegseth and testosterone screening in the military
46:57 Why the new TRT policy may be "much ado about nothing"
49:23 Low testosterone's real, well-documented health risks
52:26 Richard Dawkins, The Selfish Gene, and biohacking against nature
57:12 The schism between orthodox medicine and biohacking
62:39 What happens when the FDA raids a peptide seller
63:30 Connect with Rick Collins

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

Samuel Brown, M.Ed., CSCS is a Cognitive Performance Specialist for the U.S. Air Force and a strength and conditioning professional who has worked everywhere from collegiate athletics to elite tactical units.

Sam spends his days training Air Force pilots and aircrew who run on nicotine, caffeine, and alcohol — and almost never turn off their nervous system. In this episode he reveals why the toughest operators need recovery just as much as intensity, and what years of coaching in Altus, Oklahoma taught him about real performance under extreme cognitive load.

Expect to learn what Air Force pilots are actually like to train, why the nicotine-caffeine-alcohol "trifecta" dominates military performance culture, how the physical act of flying itself takes a hidden toll through vibration and posture, why sympathetic nervous system domination cements poor posture and movement patterns, how Sam sneaks down-regulation into hard training sessions disguised as recovery work, and why resting heart rate might be a better performance metric than any wearable, and much more.

Connect with Sam:
https://www.instagram.com/sambrownstrength

Episodes you'll enjoy next:

• #312 — Optimizing Stress and Performance for Firefighters and Tactical Athletes with Dr. Drew Gonzalez: Listen here
• #310 — Unpacking the Science of Sleep with Dr. Allison Brager: Listen here

Episode Timestamps:

• 01:59 – What Air Force Pilots Are Actually Like
• 07:21 – Back to Basics: Training with Minimal Equipment
• 10:13 – Breaking the Instagram Training Cycle
• 12:06 – Endurance Trends Among Pilots
• 17:05 – The Air Force Trifecta: Nicotine, Caffeine & Alcohol
• 20:31 – Physical Toll of Flying: Vibration, Posture & Injury
• 23:44 – Stress Cements Posture: The Sympathetic Domination Problem
• 28:06 – Down-Regulation Protocols After Training
• 30:47 – Hiding the Pill in the Peanut Butter
• 47:44 – Wearables & the Loss of Body Awareness
• 50:31 – Resting Heart Rate as the Performance Metric
• 52:14 – The GOAT Drill for Cognitive Load & Recovery
• 1:02:31 – Building a Culture of Buy-In & Program Integration

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

Dr. Krista Scott-Dixon, PhD, is the author of the 700-page textbook Applied Nutrition Coaching and Counseling for Coaches.

Most nutrition coaches know their protocols — but very few have been trained in what to actually do when a client says something unexpected, breaks down, or simply won't follow the plan. Dr. Krista Scott-Dixon reveals the counseling techniques that most nutrition coaches have never learned — and why mastering them matters more than any protocol. She explains why over-optimized clients are often the most fragile, how AI is eroding the critical thinking skills coaches rely on, and what it really takes to translate complex science into simple, effective actions.

Expect to learn why LLMs are story-making machines that confidently get facts wrong, how the broken healthcare system is pushing patients toward fringe advice, what body awareness coaching actually looks like in practice, why Dunning-Kruger applies to both coaches and clients, how to help clients prepare better conversations with their doctors, and what makes coaching an irreplaceable human profession — and much more.

Connect with Krista:
Website: https://kristascottdixon.com/
Instagram: https://www.instagram.com/stumptuous
Facebook - https://www.facebook.com/coach.krista.scottdixon
1% Better Academy - https://onepercentbetteracademy.com/

Episodes you'll enjoy next:
#328 — Grit Gains: Building Mental Toughness and Resilience in Training with Ben Mayfield Smith: https://miketnelson.com/podcast/episode-328-grit-training-and-resilience-ben-mayfield-smith
#373 — The Future of Fitness + Healthcare: Coaches, Blood Work, and Client-Centered Models: https://flex-diet-podcast.simplecast.com/episodes/episode-373-the-future-of-fitness-healthcare-coaches-blood-work-and-client-centered-models-kevin-dineen-k12eNARO

Episode Timestamps:
02:02 The Dangers of AI for Health Research
03:40 LLMs as Story-Making Machines
04:35 Mike's AI Citation Fail & the 'Dead Internet' Theory
08:55 The Antidote: Getting Back to Basic Skills
09:55 Literacy, Critical Thinking & Health Literacy Crisis
16:55 The Broken Healthcare System & Why Patients Distrust Providers
18:20 Why Parents Seek Fringe Medical Advice for Their Kids
20:55 The Power of Simple Coaching Interventions
22:55 Coaching as Translation: Complex Science, Simple Actions
26:35 Teaching Clients Body Awareness & Self-Observation
28:55 Gym Culture & The Dissociative Society
30:55 When Clients Don't Know Why They Feel Bad
33:25 Helping Clients Prepare Better Conversations with Their Doctors
37:55 AI, Cortisol Grift & Bastardized Physiology
40:55 If It's So Easy, Show Me — Krista's Coaching Insight
45:55 Dunning-Kruger, Expertise & Learning to Question Everything
51:55 Decision-Making: Low Bullshit, Cool People, Meta Skills
56:55 Choosing Projects & Finding Your Authentic Fit
61:55 The Book: Who It's For & What It Covers
74:55 Coaching as a Human Profession (Not to Be Automated)
84:55 Sprinting, Scope of Practice & Knowing Your Clients
86:55 Where to Find Krista & Closing Thoughts

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

In this episode of the Flex Diet Podcast, I sit down with Paul Oneid, MS, MS, CSCS and Cody Miller for a conversation about rebuilding from injury and the transition from strength sports to endurance training.

Paul Oneid tore both quads and rebuilt himself from powerlifter to trail runner, with coach Cody Miller guiding the transition. They break down the emergent training approach, VO2 max and cardiac adaptations, and the mental side of suffering across strength sports and endurance.

In this episode, you'll learn:

• How Paul's decision to move away from powerlifting and bodybuilding after tearing both quads
• The emergent, responsive approach Cody used to build Paul's running base from scratch
• Why cardiac structural adaptations (like resting heart rate drops) take months, not weeks
• Cody's time-to-exhaustion model for structuring endurance intervals without needing lactate testing

Find Paul here:

https://masterathletic.com

https://coachescorneru.com

https://www.instagram.com/pauloneid/

Find Cody here:

https://hoopiestrength.com/

https://www.instagram.com/coach.cody.miller

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

Can you really build more muscle just by rethinking how you dose leucine and essential amino acids? Dr. Daniel A. Traylor, Ph.D. — co-founder and principal scientist of LEUVATE™ — reveals the science behind protein quality, muscle protein synthesis, and why older adults may need twice the protein dose to get the same results as younger people.

We dig into mTORC1 signaling, sarcopenia, the 30g protein absorption myth, GLP-1 drug effects on muscle, and the clinical trial data behind LEUVATE™. If you care about muscle, longevity, or protein strategy, this one is loaded.

Guest Bio

Daniel A. Traylor, Ph.D. is an Assistant Professor of Health Sciences at DePaul University in Chicago and Owner, Co-Founder, and Principal Scientist of LEUVATE™. His research explores how protein quality, amino acids, and exercise interact to influence muscle adaptation, recovery, and physical function across the lifespan. He is the co-inventor of LEUVATE™ — a precision-engineered leucine-enriched nutritional formula validated across multiple peer-reviewed human clinical trials.

Timestamps

• 3:36 — Can you really only absorb 30g protein at once?
• 9:16 — Sarcopenia: the muscle-loss crisis in aging
• 16:01 — mTORC1 and what triggers muscle protein synthesis
• 20:46 — Why older adults may need twice the protein dose
• 30:26 — The origin story of LEUVATE™
• 34:01 — Leucine: the master switch for MPS
• 37:56 — How leucine acts as a dimmer on mTORC1
• 53:21 — GLP-1 drugs, muscle loss, and amino acid needs
• 1:06:36 — LEUVATE™ vs whey: MPS data and ongoing trials
• 1:17:01 — How leucine-enriched EAAs signal differently in the gut
• 1:27:11 — Protein spiking and supplement quality red flags

Resources

• LEUVATE™
• Dr. Traylor email

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

In this solo episode, Dr. Mike T. Nelson introduces the concept of coaching leverage—the idea that effective coaching means multiplying physiological impact by a client's realistic ability to change.

• Why sleep is a physiological powerhouse but a coaching nightmare
• The coaching leverage formula: physiology × psychology
• Why protein ranks #1 (score: 81) and sleep ranks #8 (score: 20)
• How to stop majoring in the minors with your clients
• The eight interventions inside the Flex Diet Certification
• Why following a proven system beats reinventing the wheel

The Flex Diet Certification closes tonight (Monday, June 22, 2026) at midnight Pacific. Get details here.

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

In this episode of the Flex Diet Podcast, I sit down with Dr. Sara Campbell, Ph.D., Associate Professor at Rutgers University, for a conversation about the bidirectional relationship between exercise and the gut microbiome.

Dr. Sara Campbell returns to discuss her lab's cutting-edge research on the bidirectional relationship between exercise and the gut microbiome — including why consumer gut tests oversimplify a complex ecosystem, how antibiotics devastate exercise capacity in animal models, and why single-microbe probiotics miss the bigger picture of functional guilds. She also shares new findings on short-chain fatty acids, amino acid metabolomics after antibiotic treatment, and the emerging neuromuscular junction hypothesis.

In this episode you'll learn:

• Why consumer gut microbiome tests are misleading and what functional guilds tell us instead
• How antibiotics devastate exercise capacity and the surprising metabolomic changes they cause
• The current evidence on probiotics for exercise performance and why single strains fall short
• What short-chain fatty acids do for gut health and exercise, and the emerging neuromuscular junction hypothesis

Find Sara here:
Rutgers Faculty Page
Google Scholar: Sara Chelland Campbell

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The Flex Diet Podcast is brought to you by the Flex Diet Certification. Learn more at miketnelson.com

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

In this solo episode, Dr. Mike T. Nelson dives into the intersection of AI and coaching. Using his quest to pick up the 175-pound Inch dumbbell as an example, he shows how AI struggles with niche topics where quality training data is scarce — and why that matters for fitness advice.

Topics covered:

• Why AI gave terrible advice on training for the Inch dumbbell — and what that reveals about how AI sources information
• The protein-and-kidney-damage myth: when AI repeats bad science
• Where AI actually helps coaches: data analysis, blood work organization, backend tasks, and production workflows
• Why clients still want (and need) a real human coach — accountability, customization, and skin in the game
• Will people be compliant to a robot coach? Probably not
• The baseline is rising: why just writing training and nutrition programs isn't enough anymore

Flex Diet Certification — now open through Monday, June 22nd, 2026 at midnight PST. Eight interventions (protein, fats, carbs, exercise, sleep, micronutrition, fasting, and more) built on coaching leverage and metabolic flexibility. Includes direct email access to Dr. Nelson for enrolled students.

Enroll now: https://miket.me/fdc

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

Dr. Emily Dow, PhD, RD, is a researcher and registered dietitian working at the intersection of nutrition, resistance training, and gut health.

Does vinegar actually do anything for your gut or your blood sugar? Can you trust a $200 mail-in microbiome test? Emily built her dissertation around questions like these, and her honest answers are a lot more useful than the marketing.

Expect to learn what a 12-week resistance-training-plus-vinegar protocol did (and didn't do) to gut permeability, why a null result in a healthy population is still worth your attention, what the research really says about vinegar and glucose control, why the peptide boom warrants a hard dose of skepticism, what direct-to-consumer gut testing genuinely can and can't tell you, the underrated role stress plays in GI symptoms, and why the best practitioners do both research and hands-on coaching — and much more.

—

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter

Connect with Dr. Dow: Website: https://www.dremilydow.com Instagram: https://www.instagram.com/dremilydow

Episodes you'll enjoy next: #127 — The Effect of Antibiotics on Muscle Mass & Cardiovascular Performance with Dr. Sara Campbell: https://flex-diet-podcast.simplecast.com/episodes/episode-127-the-effect-of-antibiotics-on-muscle-mass-aerobic-cardiovascular-performance-and-more-an-interview-with-dr-sara-campbell
 #222 — Nutrition, Supplements & Training with RD Sean Casey https://flex-diet-podcast.simplecast.com/episodes/episode-222-expert-insights-on-nutrition-supplements-and-training-with-registered-dietician-sean-casey

Enjoying the show? Follow the Flex Diet Podcast in your podcast app so new episodes land automatically — it's the single best way to help others find it.

Timeline 
0:00 Intro
02:29 Vinegar Research Origins 
04:12 Study Design & Training Protocol
07:42 Biodex Explained: Strength Testing 
11:49 Research Tradeoffs & Null Results 
14:49 Possible Mechanisms: Acetate 
19:55 Glycemic Control & CGM Findings 
22:21 Peptides: Hype and Risks 
28:54 Microbiome & Performance Research
30:47 Gut Testing Skepticism 
36:23 Stress and GI Symptoms 
39:22 PhD to RD Fast Track 
41:04 RD Exam Reality Check 
44:25 Scope of Practice Basics 
45:56 Referral Networks That Work 
49:29 Research vs. Coaching Gap 
58:51 Clients Drive Better Questions 
01:05:26 Why She Started Instagram 
01:09:58 Social Media for Academia 
01:13:18 Training Goals and Tattoos 
01:15:45 Where to Follow & Wrap Up
 

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In this episode of the Flex Diet Podcast, I sit down with Dr. Nathan Jenkins to discuss how to improve performance, body composition, and long-term health through the lens of aerobic development and metabolic flexibility.

Nathan shares his journey from exercise physiology and coaching CrossFit athletes to his new role teaching physiology at the University of Georgia School of Medicine. We discuss why metabolic flexibility is such a powerful framework for understanding everything from biochemistry and exercise performance to metabolic disease.

We also dive into interpreting maximal exercise testing data, including VO₂ measurements, EKG analysis, and near-infrared spectroscopy (NIRS), along with how different energy systems work together during training and competition. Nathan explains why building an aerobic base is critical for repeated high-intensity performance, how pacing impacts outcomes, and why the ability to "suffer" is actually a trainable skill.

To wrap up, we cover practical strategies you can apply right away, including prioritizing protein and carbohydrates, improving sleep quality, and addressing common micronutrient deficiencies through blood work, such as magnesium, vitamin D, and omega-3 status.

Sponsors:

• Daily Fitness Insider Newsletter: https://flex-diet.kit.com/bfa1510fa8

Available now:

• Grab a copy of the Triphasic Training II book I co-wrote with Cal Deitz here.

Episode chapters:

• 02:47 Meet Dr Nathan Jenkins
• 04:38 CrossFit Nutrition Reality Check
• 07:09 Leaving Tenure for Family
• 09:21 Back to Academia and Med Ed
• 11:29 Why Exercise Physiology Matters
• 14:36 Stress Tests Reveal Pathology
• 18:19 Max Testing and NIRS Setup
• 22:42 Raw Data Over Machine Outputs
• 24:18 Bohr Effect and Oxygen Delivery
• 28:09 Energy Systems in the Real World
• 33:05 Coaching Basics That Matter
• 35:40 Teaching Cardio From First Principles
• 36:36 Aerobic Base Reality Check
• 37:19 Cardio for Meatheads Pitch
• 39:13 CrossFit Endurance Breakthroughs
• 41:49 Fixing Time Domain Weakness
• 45:46 Pacing Like Froning Fraser
• 48:42 RAAM Gamesmanship Story
• 51:45 Pain Management Truths
• 53:23 VO2 Max Feels the Same
• 55:54 Suffering as a Skill
• 59:09 Cold Plunge Mindset Study
• 01:00:52 Caffeine Placebo and Belief
• 01:03:22 Heat Acclimation and 10K Prep
• 01:04:36 Metabolic Flexibility Lens
• 01:08:16 Teaching Diabetes Integration
• 01:10:56 Bloodwork Meets Flexibility
• 01:12:37 Where Fat Goes Wrong
• 01:15:07 Sustainable Deficit Strategy
• 01:16:34 Four Priorities Blueprint
• 01:17:21 Protein and Carb Targets
• 01:21:08 Sleep and Micronutrients
• 01:27:06 Omega-3 Testing Nuance
• 01:29:36 Wrap Up and Next Steps
• 01:31:52 Newsletter and Flex Diet Cert
• 01:33:20 Final Thanks and Subscribe

Flex Diet Podcasts you may enjoy:

• Episode 344: Metabolic Adaptations, Lactate, and Training Smarter with Dr. Phil Batterson
  • YouTube: https://youtu.be/PPZyO1nxSPA
• Episode 383: Body Composition, Strength Training, and Sustainable Habits with Martin Silva
  • YouTube: https://youtu.be/p8oM0gW488U

Connect with Dr. Jenkins:

• Website: https://www.drnathanjenkins.com/
• Instagram: https://www.instagram.com/drnathanjenkins

Get In Touch with Dr Mike:

• Instagram: Drmiketnelson
• YouTube: @flexdietcert
• Email: Miketnelson.com/contact-us

Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter