Bodybuilders are laser-focused on retaining as much muscle as possible while dieting, and for very good reason. In that context, the smallest details matter. But what about everybody else?

This episode explores a hot take on weight loss, lean mass loss, and why the usual fear of losing muscle may be overstated in the context of successful long-term weight loss. Drs Eric Helms and Eric Trexler break down what lean mass loss actually represents, how body composition changes in obesity differ from bodybuilding or weight cycling, and why the health benefits of sustained fat loss substantially outweigh moderate losses in fat-free mass.

Catch new Iron Culture episodes every Tuesday at 5:30 pm eastern time!

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Iron Culture is proudly presented by the MASS Research Review

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Chapters 00:00 Introduction 15:16 Helms' hot take on losing lean mass 19:02 Defining lean mass loss 23:28 Why obesity increases fat-free mass 30:14 Temporary versus lasting muscle loss 35:05 DEXA versus MRI measurements 42:12 Prioritizing function and quality of life 47:29 Obesity, stigma, and public health 73:35 Weighing health benefits against muscle loss

In this episode, Eric Helms and Eric Trexler share their current approaches to diet, training, and supplementation, emphasizing pragmatic strategies, individualization, and the importance of evidence-based practice. They discuss how constraints, habits, and intrinsic motivation shape their approaches to fitness, offering valuable insights for both athletes and everyday lifters.

Catch new Iron Culture episodes every Tuesday at 5:30 pm eastern time!

Be sure to use code "MRR10" for 10% off your order at elitefts.com

Iron Culture is proudly presented by the MASS Research Review

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Chapters 00:00 Introduction and episode overview 00:04 Introduction to current fitness and diet approaches 02:13 Eric Helms discusses his role as co-director at Sprints 04:00 The importance of legacy and impact in fitness and research 06:04 Transition to practical training and nutrition strategies 10:45 Current training routines and scheduling challenges 16:05 Training volume, frequency, and adaptation 22:44 Fasted training, resilience, and human adaptability 26:16 Frequency and assessment of deloads 31:32 Personal training journeys and health challenges 36:38 Training habits, constraints, and optimizing within limits 43:20 Philosophy of motivation, identity, and long-term adherence 50:49 Balancing evidence-based principles with real-world constraints 51:46 Eric Helms discusses his current diet and body composition 52:13 The importance of a holistic approach to dieting 52:25 Adjustments in diet based on body composition and goals 53:24 Caloric intake and daily habits 55:23 Meal structure and food choices 57:20 Flexible eating and meal planning 58:55 Strategies for gaining or losing weight 01:02:03 Impact of medication and food addiction on eating behavior 01:04:51 Behavioral strategies during extreme dieting 01:07:37 Supplements and their role in performance and health 01:19:15 Cardio, step counts, and cardiovascular health 01:24:34 Training adaptations and managing physical constraints 01:29:17 Balancing resistance training, cardio, and lifestyle constraints 01:34:05 Final thoughts on personalized, evidence-based practice

In this episode, Eric Helms and Steve Hall discuss training strategies, auto-regulation, the role of cardio in bodybuilding, and practical techniques for efficient training.

They share insights from their recent training camps and personal experiences to help listeners optimize their workouts and recovery.

Catch new Iron Culture episodes every Tuesday at 5:30 pm eastern time!

Be sure to use code "MRR10" for 10% off your order at elitefts.com

Iron Culture is proudly presented by the MASS Research Review

massresearchreview.com

Chapters

00:00 Introduction and episode overview

01:55 Training environment and mental focus during camps

03:57 Eric and Steve discuss recent training experiences

06:50 Auto-regulation and its role in effective training

11:59 Time-saving techniques: drop sets, clusters, and rest pause

19:49 Cardio in bodybuilding: health benefits and recovery

29:56 Monitoring performance and avoiding overtraining

39:58 Practical tips for implementing efficient training methods

49:58 Reflections on training, recovery, and future plans

In this episode, Eric Helms and Richard Collins explore the art and science of coaching, emphasizing the importance of motivation, rapport, and tailored strategies in achieving long-term success in fitness and bodybuilding. In this episode, Richard shares his extensive experience in physique sport coaching, mental performance training, and how athletes and coaches can optimize their mindset and preparation for peak performance.

Check out Richard's instagram (richard_collinscoach) to stay up to date with his work.

Catch new Iron Culture episodes every Tuesday at 5:30 pm eastern time!

Be sure to use code "MRR10" for 10% off your order at elitefts.com

Iron Culture is proudly presented by the MASS Research Review

massresearchreview.com

Chapters 00:00 Introduction and guest background 01:53 What is coaching and why it matters 04:04 The importance of motivation and internal drive 07:04 Building rapport and trust with clients 10:10 Transition from sports to bodybuilding coaching 14:53 Differences in motivation between athletes and general clients 19:56 Creating internal motivation in clients 25:07 The role of accountability and standards 29:54 The impact of emotional intelligence and relationship building 34:58 Misconceptions about tough love and discipline 40:14 The importance of understanding client context 45:04 Practical strategies for long-term adherence 49:55 Lessons learned from sports coaching 55:09 The value of humility and continuous learning 01:00:12 Closing thoughts and key takeaways

In this episode, Eric Trexler and Eric Helms explore the energetic cost of building human skeletal muscle, discussing recent research, practical implications, and misconceptions about muscle growth and energy expenditure.

Relevant papers: https://pubmed.ncbi.nlm.nih.gov/31482093/ https://pubmed.ncbi.nlm.nih.gov/37914977/ https://www.biorxiv.org/content/10.64898/2026.08.17.745156v1.full.pdf

Catch new Iron Culture episodes every Tuesday at 5:30 pm eastern time!

Be sure to use code "MRR10" for 10% off your order at elitefts.com

Iron Culture is proudly presented by the MASS Research Review

massresearchreview.com

Chapters 00:00 Introduction 01:52 Powerlifting shout-out 11:55 Introduction to new paper on energetic cost of building muscle 20:01 Components of muscle tissue building and their energy costs 22:59 Practical implications of the 3500 calorie rule 30:05 The five additive components of muscle growth energy cost 33:49 Variability in individual energy expenditure responses 40:12 Limitations and future directions in research 50:10 Summary and concluding thoughts

Trexler and Helms dig into sleep and how it intersects with body composition and supplementation. They open on the sleep-and-lifting landscape, then work through the frequently cited 2010 study on insufficient sleep and fat loss, laying out its design and the details behind its dramatic-sounding numbers. From there they discuss what the broader literature does and doesn't establish, the acute effects of sleep restriction on power, skill, and pain perception, and observational data — including sleep patterns in hunter-gatherer societies and among elite athletes — plus the relationship between sleep duration and sleep efficiency. The back half turns to supplementation. They trace the history of research on creatine and sleep, from early findings that creatine might reduce sleep need to newer work on brain creatine under sleep deprivation. This leads into a crossover trial testing caffeine and creatine against a sleep-deprivation cognitive challenge, its findings on rugby passing accuracy, and how to interpret an isolated positive result on a little-studied question. They cover a more recent high-dose replication, then close with the practical side — creatine dosing, the common report that creatine disrupts sleep, and caffeine timing — before wrapping up.

Join us for a live recording of Iron Culture! We go live Tuesdays at 5:30 pm eastern time.

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Iron Culture is proudly presented by the MASS Research Review massresearchreview.com

Chapters 0:00 Intro 9:44 Sleep & body composition 11:16 Unpacking the famous 2010 sleep study 20:52 The blind spot in the sleep literature 23:04 Sleep restriction, power, skill & pain 27:20 Sleep duration vs. sleep efficiency 31:45 The big takeaway on sleep & gains 34:57 Creatine & sleep: the research history 41:22 The caffeine vs. creatine study 44:47 What the study found 54:21 A newer high-dose replication 1:08:26 Practical application: dosing, timing & sleep complaints 1:15:44 Wrap-up

Trexler and Helms dig into Helms's new MASS article, "Are studies on untrained lifters irrelevant to trained lifters?" It's built around a new umbrella review by Andy Fry and colleagues. The recurring internet claim is that most exercise research is done on untrained people, so a trained lifter is "built different" and the findings don't apply. The hosts unpack why that's mostly wrong. They start with the messy problem of defining how "trained" someone is. Then they discuss Fry's review, which reports that roughly 70% of resistance training study participants are sedentary or untrained, with fewer than 500 out of nearly 19,000 participants counting as genuinely well-trained. But the key focus of the episode is that this doesn't invalidate the research: what makes a beginner grow more will also make an advanced lifter grow more — the difference is rate, not mechanism.

Iron Culture is proudly presented by the MASS Research Review. Mostly because Helms and Trex are co-owners. massresearchreview.com

If you're in the market for some new (ultra-high-quality) gym gear or apparel, be sure to use code "MRR10" for a 10% discount over at elitefts.com

If you'd like to submit a question for a future episode, head over to: massresearchreview.com/ironculture

Chapters 0:00 Intro 8:25 The article: do untrained studies apply? 11:31 What does "trained" even mean? 22:26 How researchers try to define training status 25:51 Fry's approach & the McKay tiers 28:07 A review of reviews: mapping the literature 32:24 The finding: 70% untrained 37:46 Is that actually a problem? 43:44 Where meta-analyses fall short 51:27 Dose, stimulus & the maintenance threshold 58:27 Realistic rates of progress & goal-setting 1:14:51 Wrap-up: you don't need perfect

In this episode, Eric Helms and Steve Hall explore the nuances of body recomposition, optimal bulking and cutting strategies, and the science behind muscle gain and fat loss. They discuss recent research, practical insights, and debunk common myths to help athletes optimize their training and nutrition.

Iron Culture is proudly presented by the MASS Research Review. Mostly because Helms and Trex are co-owners. massresearchreview.com

If you're in the market for some new (ultra-high-quality) gym gear or apparel, be sure to use code "MRR10" for a 10% discount over at elitefts.com

If you'd like to submit a question for a future episode, head over to: massresearchreview.com/ironculture

Chapters 00:00 Audio Troubles and Nostalgia 02:47 Heat and Body Temperature During Massing 05:58 Gaining Weight: Personal Experiences and Insights 09:02 Recomposition: Understanding the Nuances 11:59 Surplus vs. Maintenance: The Anabolic Debate 14:45 The Role of Body Composition in Muscle Gain 18:05 Deficits and Muscle Gain: A Closer Look 20:53 The Impact of Training Experience on Gains 23:50 Psychology of Body Image and Muscle Growth 34:30 Evolution of Perspectives in Bodybuilding 35:30 The Surplus Dilemma: Muscle Gain vs. Fat Gain 39:35 Post-Show Recovery: Finding the Balance 43:43 The Impact of Body Fat on Muscle Growth 46:26 Psychological Aspects of Bodybuilding and Recovery 51:20 Understanding Muscle Memory and Recovery 01:04:31 The Complexity of Body Composition Studies

A methods-focused episode about how muscle and body-composition measurements can mislead you when reading the research. The main event is a new Balshaw and colleagues paper concluding that ultrasound muscle thickness is a poor index of MRI-measured muscle growth. Trexler and Helms argue this shouldn't be read as "throw out all ultrasound research" — the real culprit is that muscle thickness is a crude one-dimensional snapshot with measurement error large enough to swamp the small changes seen in typical short studies, whereas MRI captures growth in more dimensions with better fidelity. They walk through why comparing across different dimensions and different devices matters, what researchers can do about it (bigger doses, larger samples, multiple measurements), and use the famous "sleep restriction kills your gains by 60%" study as an example of over-reading a tiny difference in ten people.

The second half turns to DEXA. Prompted by someone confused that DEXA fat mass didn't line up with the 3,500-calorie rule, they explain DEXA's three-compartment model, why it measures fat mass rather than adipose tissue, and why lean soft tissue readings are so sensitive to hydration. The practical upshot: don't build your worldview on a kilogram of day-to-day DEXA noise, be cautious using DEXA to estimate energy status, and understand that flattening a three-dimensional body into a two-dimensional scan introduces real limits. They close with an extended, tongue-in-cheek bit about trademarking "muscle journey" dimensions.

Iron Culture is proudly presented by the MASS Research Review. Mostly because Helms and Trex are co-owners. massresearchreview.com

If you're in the market for some new (ultra-high-quality) gym gear or apparel, be sure to use code "MRR10" for a 10% discount over at elitefts.com

If you'd like to submit a question for a future episode, head over to: massresearchreview.com/ironculture

Chapters 0:00 Intro 5:57 The paper: is ultrasound a poor muscle-growth measure? 18:04 What muscle thickness actually captures 25:38 Measurement error vs. a tiny signal 31:16 Different dimensions, different devices 37:52 What researchers should do about it 39:26 Case study: does sleep loss "kill gains"? 47:28 On to DEXA: where this started 53:26 How DEXA works & why fat mass ≠ adipose tissue 1:02:15 Why methods don't always agree 1:11:06 Water weight & the whooshing scale 1:16:43 Estimating energy status from DEXA 1:19:36 Wrap-up

In today's Q&A episode, the Erics work through a few listener questions. First they tackle upper/lower body imbalance — why lagging body parts usually call for improving training quality before adding volume, and why standout muscle groups can be maintained on surprisingly little work. Next is a long discussion on managing fatigue and exercise sequencing in high-frequency, non-traditional splits, including why the "48 hours between muscle groups" rule is more dogma than requirement and how to think about fatigue as continuous rather than categorical. The episode closes with a multifaceted question on REDs (relative energy deficiency in sport) — what it is, its warning signs, and the limits of what bloodwork can actually tell you.

Iron Culture is proudly presented by the MASS Research Review. Mostly because Helms and Trex are co-owners. massresearchreview.com

If you're in the market for some new (ultra-high-quality) gym gear or apparel, be sure to use code "MRR10" for a 10% discount over at elitefts.com

If you'd like to submit a question for a future episode, head over to: massresearchreview.com/ironculture

Chapters 0:00 Intro 4:25 Fixing upper/lower body imbalance 6:39 Quality before quantity 9:03 Why standout muscles hold with less work 12:25 Fatigue & sequencing high-frequency training 17:58 How to actually sequence back-to-back days 23:56 Lifting "rules" set in concrete 26:09 Are lifters too worried about fatigue? 39:34 REDs (relative energy deficiency in sport) 40:51 Liver enzymes, creatinine & training stress 46:07 Cholesterol/LDL & other markers 1:00:21 Wrap-up

The Erics sit down with bone health expert Dr. Lora Giangregorio, a professor of kinesiology at the University of Waterloo, to unpack what's actually known about how bone adapts to resistance training. The conversation covers why bone changes so slowly, the many sources of measurement error in DEXA scans, and why so much of the exercise-and-bone literature is underpowered and hard to interpret. Dr. G makes a central practical case: for building bone, the message shouldn't be "lift heavy" but rather "work hard." Emphasizing high effort over intimidating absolute loads lowers the barrier to entry, especially for older and osteoporotic populations, while still driving progressive overload. She argues the best current bet is combining moderate-to-high-intensity resistance training with impact work, introduced gradually on a foundation of strength. Along the way she debunks popular but weakly supported interventions, including weighted vests and whole-body vibration platforms, and discusses the difference between biological aging and simple chronic inactivity in bone loss.

Iron Culture is proudly presented by the MASS Research Review. Mostly because Helms and Trex are co-owners. massresearchreview.com

If you're in the market for some new (ultra-high-quality) gym gear or apparel, be sure to use code "MRR10" for a 10% discount over at elitefts.com

If you'd like to submit a question for a future episode, head over to: massresearchreview.com/ironculture

Chapters 0:00 Intro 4:13 Meet Dr. Lora Giangregorio 7:44 Why bone adapts so slowly 11:42 DEXA error & why to be skeptical 23:07 Does load matter? 33:58 "Heavy" vs "hard" & barrier to entry 42:42 What is impact training? 47:31 The science communication problem 52:55 The weighted vest myth 58:13 Muscle pull, compression & light loads 1:06:48 Do vibration platforms work? 1:09:54 Aging vs. inactivity 1:15:46 Drugs & HRT for bone 1:20:24 How the medications work 1:24:27 Wrap-up & where to find Dr. G