Episodes
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In this Iron Culture/Sports Nutrition Association/Sigma Nutrition Radio crossover episode, host Eric Trexler is joined by co-host Danny Lennon and guest Dr. Shawn Arent. Dr. Arent is a professor and department chair at the University of South Carolina with a wealth of knowledge and research experience pertaining to nutritional strategies and supplements purported to support brain health and function. In this meeting of the minds, Eric, Danny, and Dr. Arent discuss the brain-related effects of carbohydrate, amino acids, caffeine (and caffeine-related substances), theanine, nicotine, fish oil, creatine, and much more. If youâre interested in preserving the health and function of your brain, listening to this episode is certainly a smart decision.
00:00 Introduction to another crossover episode and Dr Shawn Arent
03:20 Defining cognitive performance and function
07:48 The acute effects of carbohydrates and caffeine on fatigue
13:01 Carbohydrate mouth rinsing and glycogen depletion (and are bodybuilders athletes?)
26:15 The (non-linear) glycogen utilisation response to exercise
29:53 The role of protein (EAAs and BCAAs) on cognitive function
Daivs 1999 Effects of branched-chain amino acids and carbohydrate on fatigue during intermittent, high-intensity running https://pubmed.ncbi.nlm.nih.gov/10452228
36:06 Caffeine dose-response relationship on cognition
40:50 Caffeine timing and dosing strategies
51:38 Optimisation and thinking outside the box to minimise the effects of caffeine on sleep
55:18 Other (interesting) supplements with less evidence
1:01:28 Nicotine and sports culture
1:08:52 Supplementation for brain health and recommendations/protocols for TBIs
1:21:22 Closing out with some final take homes
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In this crossover episode of Iron Culture and MASS Office Hours, Dr. Trexler is joined by special guest Josh Pelland, a coach for Data Driven and a PhD candidate at Florida Atlantic University, to discuss Pelland's recent meta-analysis which investigates the effects of training volume and frequency on hypertrophy and strength outcomes. These data have created a lot of stir in the evidence based community as very high volumes seem to be associated with hypertrophy without a definitive plateau. But as you can expect, thereâs much more to the story. The analysis synthesizes data from numerous studies and quantifies dose-response relationships by which higher training volumes and/or frequencies may lead to greater strength and muscle gains in response to resistance training. In a thorough discussion of the paper, Pelland discusses nuances, such as the point of diminishing returns where further volume or frequency may yield less significant gains, and highlights how individual factors like training experience and muscle group-specific responses affect outcomes. Practical recommendations include tailoring volume to individual needs, utilizing periodization and volume cycling to maximize adaptations, and addressing common pitfalls such as overtraining. Further, in this live episode audience questions drive deeper exploration into the practical implications of the findings and strategies for optimizing training programs based on current evidence.
If you liked this crossover, remember the MASS crew goes live for Office Hours every Wednesday night at 7pm eastern time. Be sure to join them for a future episode!
0:00 Introduction to another official crossover episode
MASS Office Hours Episode 58 (Is More Volume Always Better?) https://www.youtube.com/watch?v=0HErS8Hw12k
02:00 Getting to know Josh Pelland
07:35 An overview of Joshâs new preprint
Pelland 2024 The Resistance Training Dose-Response: Meta-Regressions Exploring the EïŹects of Weekly Volume and Frequency on Muscle Hypertrophy and Strength Gain https://sportrxiv.org/index.php/server/preprint/view/460
Data Driven Strength Podcast - Volume and Hypertrophy: New Science Explained | S2E1 https://www.youtube.com/watch?v=yKRAVrf-798&t=0s
Data Driven Strength Podcast - Frequency and Hypertrophy: New Science Explained | S2E2 https://www.youtube.com/watch?v=1rxOj92Q4p8
14:01 The search strategy and volume/frequency quantification method comparison
25:43 Statistical models
30:51 Volume results
39:32 Volume efficiency tiers
1:08:47 Frequency results
1:16:43 Q&A Question 1: How was the volume of different exercises quantified?
1:18:36 Question 2: Disconnect between theoretical vs practical optimum?
1:25:00 Question 3: How were different set structures, intensification techniques, and proximity-to-failure accounted for?
1:28:55 Question 4: Recommendations for 6x/week Full Body Powerbuilding training?
1:30:53 Question 5: The potential effects of different partials and ranges of motion?
1:34:45 Question 6: Did the studies measure both hypertrophy and strength outcomes?
1:36:10 Question 7: Strength training recommendations for sprint cyclers?
1:39:03 Question 8: Upper vs lower body set volume tolerance?
1:40:45 Question 9: Moderator analyses on the impact of training status?
1:42:50 Question 10: How do you know if you are performing too much volume?
1:46:36 Wrapping up and where to find Josh
Data Driven Strength YouTube https://www.youtube.com/@datadrivenstrength
Instagram @josh.datadrivenstrength https://www.instagram.com/josh.datadrivenstrength/?hl=en
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Episodes manquant?
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There is a great deal of fitness content about strategically modifying your diet or changing your physique. Many of these strategies may appear to be simple on paper, but they are inseparable from the complexity of human perception and emotion. Whether we like it or not, diet or physique manipulation inherently interact with concepts relating to oneâs confidence, body image, self-esteem, and relationship with food. Further, many fitness coaches and clients mistakenly believe that poor body image or self-esteem are improved by simply changing oneâs body. A growing area of interest in the fitness space aims to directly address and improve these outcomes by focusing on beliefs and behaviors in the absence of physique manipulation. In this crossover episode with Sigma Nutrition Radio and the Sports Nutrition Association, Eric Trexler and Danny Lennon are joined by Dr. Gabrielle Fundaro to take an evidence-based and practical look at the ways diet or physique modifications interact with confidence, body image, and self-worth.
00:00 Welcome to another crossover episode (passively) dominated by Iron Culture
02:09 Defining body image and self-esteem
07:49 Relationship with food and weight stigma
21:22 Are your behaviours and beliefs really sustainable?
32:13 Different approaches to safe weight modification
39:19 Screening for risk factors and contraindications
47:20 Scope of practice and individuals who fall into the gaps
53:20 Interventions and approaches for improving body image
58:28 Closing out with some links
Sports Nutrition Association https://sportsnutritionassociation.com/
Sigma Nutrition https://sigmanutrition.com/
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The Iron Culture universe is expanding! In this crossover episode the host of Sigma Nutrition Radio, Danny Lennon, joins Eric Helms to co-host! Dr. Cliff Harvey, who did his PhD on ketogenic diets at AUT, joins Danny and Eric to discuss the often conflicting research and anecdotes on the effect of carbohydrates on lifting performance, adaptations and body composition change. Eric, Danny and Cliff are all on the Sports Nutrition Association (SNA) advisory board - an organisation dedicated to supporting the profession of sports nutrition. The board is packed with nutrition experts with a ton of experience. This is the first of many crossover episodes to come where Iron Culture, Sigma Nutrition Radio, and the SNA combine forces to bring you the best practical, science-based nutrition content possible!
00:00 Danny? Entering the multiverse (Sigma Iron Culture Nutrition Radio Ultra Podcast Show)
02:00 An update on carbohydrates for resistance training performance
05:34 The spectrum of carbohydrate intake related to work demands and Cliffâs approach
15:13 The complexities of substrate utilisation and glycogen replenishment
Hokken 2021 Subcellular localization- and fibre type-dependent utilization of muscle glycogen during heavy resistance exercise in elite power and Olympic weightlifters https://pubmed.ncbi.nlm.nih.gov/32961628/
King 2022 The Ergogenic Effects of Acute Carbohydrate Feeding on Resistance Exercise Performance: A Systematic Review and Meta-analysis https://pubmed.ncbi.nlm.nih.gov/35809162/
Naharudin 2019 Breakfast Omission Reduces Subsequent Resistance Exercise Performance https://pubmed.ncbi.nlm.nih.gov/30707135/
Naharudin 2020 Viscous placebo and carbohydrate breakfasts similarly decrease appetite and increase resistance exercise performance compared with a control breakfast in trained males https://pubmed.ncbi.nlm.nih.gov/32174286/
28:10 Intrasession carbohydrate intake and mouth rinsing
King 2024 Isoenergetic pre-exercise meals varying in carbohydrate similarly affect resistance training volume performance compared to placebo https://sportrxiv.org/index.php/server/preprint/view/443/version/566
41:03 The placebo/nocebo effect related to food intake around training
53:30 Reconsidering nutrient timing and individualising coaching approaches
1:06:54 Goals, optimising approaches, and methodological considerations in the research
Vargas-Molina 2020 Effects of a ketogenic diet on body composition and strength in trained women https://pubmed.ncbi.nlm.nih.gov/32276630/
Paoli 2021 Effects of Two Months of Very Low Carbohydrate Ketogenic Diet on Body Composition, Muscle Strength, Muscle Area, and Blood Parameters in Competitive Natural Body Builders https://pubmed.ncbi.nlm.nih.gov/33530512/
1:17:11 Individual approaches to ketogenic diets and does macronutrient distribution really matter?
Harvey 2019 Low-carbohydrate diets differing in carbohydrate restriction improve cardiometabolic and anthropometric markers in healthy adults: A randomised clinical trial https://pubmed.ncbi.nlm.nih.gov/30740270/
1:25:48 Considerations for a low carbohydrate/ketogenic approach and ketosis misunderstandings
1:30:02 The take home and closing out
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Weightlifting came before powerlifting, but did you know weightlifting wasnât exactly the first barbell sport? Or rather, did you know that the first iteration of weightlifting was VERY different than what we see today in the Olympics? The history of weightlifting is fascinating, and in this episode of Iron Culture Drs Conor Heffernan and Cliff Harvey are back to share their experiences with, and the history of, All Around Lifting, the original barbell sport. With literally hundreds of potential lifts to compete in, All Around Lifters are barbell generalists rather than specialists, and both strong and versatile. Modern All Around meets are very similar to the original lifting competitions from the early 19th century before weightlifting centralised around the snatch, clean and jerk and clean and press (and eventually just the snatch and clean and jerk), and before modern strongman, powerlifting or CrossFit existed. While you may know Cliff Harvey as a nutrition researcher, he is also a former All Around world champion weightlifter and amateur historian. He shares his experience while Conor goes into the fascinating tale of how weightlifting began, and how modern All Around Lifting recaptures it.
00:00 Omar? And All Around lifting?
02:10 Welcoming back Drs. Conor Heffernan and Cliff Harvey and where everything lifting started
07:01 The format and how to prepare for All Around Lifting
15:11 The attraction of All Around Lifting
24:40 A deep dive into the history of All Around
38:49 Specialisation vs generalisation and accessibility of All Around
55:05 âEvidence-basedâ training and individualisation
1:05:28 Cliffâs experience competing
1:15:10 Reframing your perspective and goals as you progress and age
1:20:35 Where to learn more about (and participate in) All Around Lifting and closing out
https://www.iawa.uk/
https://www.usawa.com/
https://www.youtube.com/@USAWAVideos
https://www.youtube.com/user/dinnie40
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How do we know what we know? And do we know what we think we know? If your answer is âI donât know,â then this episode is for you. In this classic-style episode, Omar and Helms sit down for a spirited chat on epistemology: the theory of knowledge, as it relates to hypertrophy. In the âevidence-basedâ world some people always claim to have things figured out entirely. In the case of hypertrophy, some people currently can explain with a âmodelâ what must occur in training to produce hypertrophy, in a logically consistent narrative, based in true aspects of physiology. However, just because something is logically consistent and contains elements of truth, doesnât necessarily make it entirely correct. So first, we should ask, when and why should models be used in scientific inquiry? How do models sit in relation to empirical studies? How does one check the veracity of a model? Is a âmodelâ really a model if nothing was actually modelled? Can it be valid if it is contradicted by dozens of controlled trials? Most importantly, will we ever be ok with feeling uncomfortable and embracing our ignorance in the search of knowledge? Or, are we doomed to repeat the mistake of prematurely clinging to intellectually satisfying, logical, complete, yet factually incorrect answers whenever there are gaps in our understanding that makes us uncomfortable?
00:00 Do you know what you know?
04:56 Fitness content creators and models of hypertrophy
Refalo 2023 Influence of Resistance Training Proximity-to-Failure on Skeletal Muscle Hypertrophy: A Systematic Review with Meta-analysis https://pubmed.ncbi.nlm.nih.gov/36334240/
Robinson 2024 Exploring the Dose-Response Relationship Between Estimated Resistance Training Proximity to Failure, Strength Gain, and Muscle Hypertrophy: A Series of Meta-Regressions https://pubmed.ncbi.nlm.nih.gov/38970765/
17:15 Studies in sport science without black and white results/answers and mathematical models
27:55 (Dis)confirming models and considering scientific evidence
The Evidence is Lacking for âEffective Repsâ by Greg Nuckols https://www.strongerbyscience.com/effective-reps/
Grgic 2018 Effect of Resistance Training Frequency on Gains in Muscular Strength: A Systematic Review and Meta-Analysis https://pubmed.ncbi.nlm.nih.gov/29470825/
43:01 Engaging in dialogue regarding these models
48:24 Closing out this overdelivering 50 minute episode
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Research moves slow, well, at least slower than we wish it did. But, that doesnât mean it doesnât also produce paradigm shifts that shake up practice. In this episode Dr. Helms and Dr. Trexler sit down to answer questions using research, most of which that is actually still in the publication process and not yet available. This research will have a major impact on the future of practice in nutrition, as it relates to protein while dieting, training, as it relates to how much volume lifters perform, and cardio, for both training and health. You donât want to miss this cutting edge research Q&A!
00:00 Can Trexler get out of the old school matrix? And an insight into scientific publishing
Helms 2014 Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation https://pubmed.ncbi.nlm.nih.gov/24864135/
Helms 2015 Recommendations for natural bodybuilding contest preparation: resistance and cardiovascular training https://pubmed.ncbi.nlm.nih.gov/24998610/
05:46 Getting into the Q&A. Question 1: Pprotein intakes during dieting
Helms 2014 A systematic review of dietary protein during caloric restriction in resistance trained lean athletes: a case for higher intakes https://pubmed.ncbi.nlm.nih.gov/24092765/
Morton 2018 A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults https://pubmed.ncbi.nlm.nih.gov/28698222/
18:08 Unwrapping some Christmas gifts: Helmsâ Masters research and some conclusion from the upcoming systematic review and meta-regression
Nunes 2022 Systematic review and meta-analysis of protein intake to support muscle mass and function in healthy adultshttps://pubmed.ncbi.nlm.nih.gov/35187864/
35:08 Question 2: Cardio intensity
https://massresearchreview.com/
Hamaya 2024 Time- vs Step-Based Physical Activity Metrics for Health https://pubmed.ncbi.nlm.nih.gov/38767892/
Steele 2021 Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Traininghttps://pubmed.ncbi.nlm.nih.gov/34822354/
Mielke 2024 Physical activity volume, frequency, and intensity: Associations with hypertension and obesity over 21 years in Australian womenhttps://pubmed.ncbi.nlm.nih.gov/38735532/
57:06 Question 3: Resistance training volume
Schoenfeld 2017 Dose-response relationship between weekly resistance training volume and increases in muscle mass: A systematic review and meta-analysishttps://pubmed.ncbi.nlm.nih.gov/27433992/
Baz-Valle 2022 A Systematic Review of The Effects of Different Resistance Training Volumes on Muscle Hypertrophy https://pubmed.ncbi.nlm.nih.gov/35291645/
Robinson 2024 Exploring the Dose-Response Relationship Between Estimated Resistance Training Proximity to Failure, Strength Gain, and Muscle Hypertrophy: A Series of Meta-Regressions https://pubmed.ncbi.nlm.nih.gov/38970765/
1:06:23 Closing out this hour of power episode
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In this Iron Culture episode Dr. Helms sits down with fellow 3DMJ coaches and Iron Culture veterans Brian Minor and Alberto Nunez for a spirited debate about who they each think are the top 5 natural male bodybuilders of all time. Bodybuilding is where art and culture meet science, where science meets sport, and if you are a fan of natural bodybuilding and its history, you will love this episode. Listen in as they struggle to even agree on a criteria for someone to be The Natty GOAT, learn little-known facts about the early years of Kai Greeneâs career when he was natural, and pay careful attention to the honourable mentions, as there are many potential candidates, for the âMt. Rushmore plus oneâ of natty competitive bodybuilding.
00:00 Welcome to an exciting episode without Omar and Trexler
02:29 Brian and Bertoâs history with bodybuilding
Iron Culture Ep. 26- How Progressive Overload Actually Works https://www.youtube.com/watch?v=sfe8tsxFieI&t=37s
10:20 A debate of the Mt Rushmore + 1 of natural bodybuilding
23:00 A quick Kai Greene and IFBB/NPC history lesson
28:30 Continuing the debate
51:00 Fleshing out everyoneâs 5th and final competitor and some honourable mentions
1:14:13 The top 5 ranked
1:20:48 Final comments and closing out
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Caffeine is incredibly popular among lifters and non-lifters alike. In a variety of cultures all across the globe (including the iron culture), caffeine is a daily staple. While most people use caffeine for a morning boost of energy, lifters have long used caffeine as a performance-enhancing supplement. There is a tremendous amount of evidence reporting acute ergogenic effects from a single dose of caffeine, but there is a surprising lack of research addressing critical questions about caffeine's utility as an "everyday" pre-workout supplement. In today's episode, Eric Trexler reviews a new study suggesting that caffeine improves performance when consumed in the morning, but not in the evening. This is followed by an in-depth discussion about when caffeine may (or may not) be effectively used as a performance-enhancing supplement, and how to balance potential tradeoffs between acute performance enhancement and sleep disruption.
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This week 2x 66kg IPF Open World Champion Panagiotis âPanaâ Tarinidis joins Eric Helms on Iron Culture to discuss the state of modern powerlifting. The two of them recently joined legends, phenoms, leaders and top thinkers of the sport like John Haack, Greg Nuckols, Lya Bavoil and others at the 2024 European Powerlifting Conference in Limerick Ireland. The existence of such events is emblematic of powerliftingâs growth, but so too is just how competitive IPF powerlifting has become. At 2024 IPF Worlds the podium for the 66kg class was decided by bodyweight, as all three men had identical totals. In this interview Pana shares what it takes to stay in the fight in modern powerlifting, how hard it is to vie for a championship title when the competition is so tight, and the mindset, passion, and focus it requires.
00:00 Intro with the ânew Omarâ and a recap of the European Powerlifting Conference
09:03 The lifting stones
18:20 Goals and learning from meaningful achievements â Panaâs recent IPF Worldâs experience
30:35 The things that can make an effective athlete
39:13 Powerlifting meets and Panaâs strong self-belief
47:40 The changes Pana is going to implement into his training
54:39 Experimenting and challenging your beliefs
1:00:47 Panaâs advice for improving yourself and closing out
https://massresearchreview.com/
Where to find Pana
Instagram @thepanash https://www.instagram.com/thepanash/?hl=en
YouTube @Thepanash https://www.youtube.com/channel/UCB1ZlR9h035btvu0t6qFWYg
The Panash Training App https://thepanash.app/
Silent Worker https://www.silentworker.fr/
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The classic Iron Culture duo hosts this weekâs episode to discuss exercise variety. How have the views on this topic changed over the years and why? First, we need to understand how and when bodybuilding separated from strength sport, equipment availability changes over time, and how these factors impacted the perception of exercise variety. From the Weider âMuscle Confusion Principleâ to motor learning concepts like varied practice, thereâs been discussion of exercise variety in both the trenches and research for decades. In the modern era, concepts like regional hypertrophy and more nuanced understanding of functional anatomy have become more common and widely understood and accepted, leading to the acceptance that at least for hypertrophy, higher exercise variety is necessary to maximise the development of specific muscle groups. But, as they say, a little knowledge is a dangerous thing. Many without a sufficiently complete understanding of anatomy make errors when it comes to claims about exercise selection and variety for bodybuilding. So listen in on this episode as we talk through the history, science and culture of exercise variety for hypertrophy, as well as strength!
00:00 A duo episode without the LLM (Chat-GPT) Eric
03:26 Getting into the topic of variety â starting with the muscle confusion principle
15:03 Exercise variation and regional hypertrophy
Antonio 2000 Nonuniform Response of Skeletal Muscle to Heavy Resistance Training Can Bodybuilders Induce Regional Muscle Hypertrophy? https://journals.lww.com/nsca-jscr/Abstract/2000/02000/Nonuniform_Response_of_Skeletal_Muscle_to_Heavy.18.aspx
21:39 The importance of understanding functional anatomy and discussing the evidence
Chillibeck 1998 A comparison of strength and muscle mass increases during resistance training in young women https://pubmed.ncbi.nlm.nih.gov/9459538/
Rauch 2020 Auto-Regulated Exercise Selection Training Regimen Produces Small Increases in Lean Body Mass and Maximal Strength Adaptations in Strength-trained Individuals https://pubmed.ncbi.nlm.nih.gov/29016481/
Burke 2024 Exercise Selection Differentially Influences Lower Body Regional Muscle Development https://link.springer.com/article/10.1007/s42978-024-00299-4
Kubo 2019 Effects of squat training with different depths on lower limb muscle volumes https://pubmed.ncbi.nlm.nih.gov/31230110/
BrandĂŁo 2020 Varying the Order of Combinations of Single- and Multi-Joint Exercises Differentially Affects Resistance Training Adaptations https://pubmed.ncbi.nlm.nih.gov/32149887/
Kinoshita 2023 Triceps surae muscle hypertrophy is greater after standing versus seated calf-raise training https://pubmed.ncbi.nlm.nih.gov/38156065/
43:23 Shaping the content and some of the real-world application of these recommendations
50:28 The potential effect of the leg press on the calves and implementing exercise variation
1:00:23 Some final hypotheticals to close out this monster episode
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The Erics are back, and this time, they work through a mental model of how training volume, or rather, the training dose changes over time. With a rank novice, a single set to failure done once per week will typically produce continued adaptation, and they wonât plateau for 1-2 years! However, if you take an advanced strength athlete or bodybuilder, a single set to failure done once per week seems to not only be insufficient for measurable progress to occur, but is even lower than doses that result in small losses of muscle mass. So, it seems the that the minimum effective dose of training changes as one reaches higher levels of training status. But does this mean volume needs increase with training status? Not exactly, but that depends on how you define âneeds.â There is an interaction of these concepts with the minimum detectable change we can notice, our goals, the timeline we wish to achieve them in, and also the slowing rate of progress that naturally occurs as one gets closer to their potential. Can the Erics reconcile these complexities into a defensible mental model of how the needed training dose changes over time? Tune in to find out!
00:00 Omar and Helms walked⊠so Trexler and Helms could run
02:13 Letâs talk about the topic
06:44 Training age vs status
15:04 Minimalistic level programs as a novice and an intermediate
Steele 2024 Long-Term Time-Course of Strength Adaptation to Minimal Dose Resistance Training Through Retrospective Longitudinal Growth Modeling https://pubmed.ncbi.nlm.nih.gov/35591809/
Travis 2020 Preparing for a National Weightlifting Championship: A Case Series https://pubmed.ncbi.nlm.nih.gov/31373973/
Androulakis-Korakakis 2021 The Minimum Effective Training Dose Required for 1RM Strength in Powerlifters 2021 https://pubmed.ncbi.nlm.nih.gov/34527944/
27:51 Ericâs personal example and scaling back once you are advanced
34:10 Talking about long muscle training again (to alter the stimulus)
Maeo 2021 Greater Hamstrings Muscle Hypertrophy but Similar Damage Protection after Training at Long versus Short Muscle Lengths https://pubmed.ncbi.nlm.nih.gov/34527944/
Kassiano 2023 Greater Gastrocnemius Muscle Hypertrophy After Partial Range of Motion Training Performed at Long Muscle Lengths https://pubmed.ncbi.nlm.nih.gov/37015016/
45:43 Perceived plateaus, the dose, and risks
57:58 Exploring different training dose concepts
Ogasawara 2011 Effects of periodic and continued resistance training on muscle CSA and strength in previously untrained men https://pubmed.ncbi.nlm.nih.gov/21771261/
Ogasawara 2012 Comparison of muscle hypertrophy following 6-month of continuous and periodic strength training https://pubmed.ncbi.nlm.nih.gov/23053130/
1:10:13 Closing out and Trexlerâs ideas for future Iron Culture episodes
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The trio is back to discuss a classic Iron Culture topic: how much does increasing muscle mass contribute to strength? But, before we can answer how much, we must acknowledge that some in the scientific community doubt whether hypertrophy contributes to strength at all! What is the source of this skepticism and how do we resolve this debate? Tune in to learn not only how getting jacked impacts strength, but also the importance of study design, what is needed to make causal inferences, and how to make conclusions in the absence of ideal data.
00:00 Reviewing reviews (and adding a missing reference)
Cook 2019 Body Mass and Femur Length Are Inversely Related to Repetitions Performed in the Back Squat in Well-Trained Lifters https://pubmed.ncbi.nlm.nih.gov/30640306/
MASS Research Reviews https://massresearchreview.com/
16:29 End of the extended banter and into the topic (getting into some research design)
24:25 Breaking down the first study and correlated changes
Tromaras 2024 Lean Body Mass, Muscle Architecture and Powerlifting Performance during Preseason and in Competition https://pubmed.ncbi.nlm.nih.gov/38804455/
Brechue 2002 The role of FFM accumulation and skeletal muscle architecture in powerlifting performance https://pubmed.ncbi.nlm.nih.gov/11990746/
Ye 2013 Relationship between lifting performance and skeletal muscle mass in elite powerlifters https://pubmed.ncbi.nlm.nih.gov/23828289/
Xu 2021 Measurement of visceral fat and abdominal obesity by single-frequency bioelectrical impedance and CT: a cross-sectional study https://pubmed.ncbi.nlm.nih.gov/34635516/
Ferland 2023 Body Composition and Maximal Strength of Powerlifters: A Descriptive Quantitative and Longitudinal Study https://pubmed.ncbi.nlm.nih.gov/37637239/
38:51 The responses to different lines of evidence
Bhasin Testosterone dose-response relationships in healthy young men https://pubmed.ncbi.nlm.nih.gov/11701431/
Warneke 2023 Comparison of the effects of long-lasting static stretching and hypertrophy training on maximal strength, muscle thickness and flexibility in the plantar flexors https://pubmed.ncbi.nlm.nih.gov/37029826/
Wohlann Influence of 8-weeks of supervised static stretching or resistance training of pectoral major muscles on maximal strength, muscle thickness and range of motion https://pubmed.ncbi.nlm.nih.gov/38240811/
53:10 A methodology shoutout to the sceptics
Buckner 2021 Do exercise-induced increases in muscle size contribute to strength in resistance-trained individuals? https://pubmed.ncbi.nlm.nih.gov/33724646/
1:02:06 Omarâs argument and closing out
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PhD candidate Ryan Anthony joins the Erics on Iron Culture to discuss the fishy business of Omega-3 supplementation. Ryan is in the final years of his PhD research at the University of Wollongong in Australia, investigating the role of omega-3 fatty acids in reducing muscle fatigue and soreness following exercise. His research has identified consistent methodological issues in many of the studies on the topic, which may explain why omega-3 data has become more mixed in recent years. In this episode youâll learn exactly what omega-3 fatty acids are, how they function in the body, the difference between EPA and DHA and the relevance of their differences, if it is worth supplementing with omega-3s, and whether most supplements on the market are actually properly formulated to provide the potential positive impact sometimes observed in research.
00:00 Itâs the tag team Eric duo with an introduction to fish oil supplementation
03:08 Introducing our guest Ryan, his research, and Omega-3s
11:57 Fish oil trials, biomarkers, and adverse outcomes
Harris 2017 The Omega-3 Index and relative risk for coronary heart disease mortality: Estimation from 10 cohort studies https://pubmed.ncbi.nlm.nih.gov/28511049/
20:40 The methodologies employed in this area of research
Anthony 2021 The Influence of Long-Chain Omega-3 Fatty Acids on Eccentric Exercise-Induced Delayed Muscle Soreness: Reported Outcomes Are Compromised by Study Design Issues https://pubmed.ncbi.nlm.nih.gov/33477110/
Anthony 2024 A review and evaluation of study design considerations for omega-3 fatty acid supplementation trials in physically trained participants https://pubmed.ncbi.nlm.nih.gov/36620998/
33:40 The effects of Fish oil supplementation on various outcomes
44:35 The Omega-6 to Omega-3 ratio, arachidonic acid and the inflammatory response
54:55 Clarifying some of the evidence and some practical considerations of supplementation
59:57 Ryanâs breaks down his research
1:09:55 Practical applications for strength and physique athletes
https://granttinsley.com/third-party-testing-dietary-supplements
1:15:25 Final words: TBIs and high Mercury, and closing out
https://www.researchgate.net/profile/Ryan-Anthony-2
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Walter Cariazo joins Omar and Eric Helms on Iron Culture to discuss his decade-long journey in powerlifting. Heâs won the 93kg National Championship twice and the 105kg National Championship once in Canada and has had the opportunity to represent Canada twice at the IPF World Championship, most recently in Lithuania in June. In this most recent competition, he was a dark horse for the podium, as he placed 4th in the 105kg class, getting the opportunity to pull for the bronze medal position, which would have secured him a spot in the first World Games in 2025 to include the raw division. While this in and of itself is worth highlighting, most impressively, Walter has continually progressed in his decade in the sport, despite a busy, demanding work and life schedule. He is a full-time medical radiation technologist, in addition to working as a videographer (you may have seen him on Omarâs YouTube channel) and photographer. The perennial lifelong lifter, Walter embodies the spirit of iron culture as a âblue-collar powerlifterâ who is optimizing his lifting pursuits within the constraints of life - approaching the pinnacle of the sport while doing so.
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A long lifting career comes with plenty of ups and downs, so weâre accustomed to hearing stories about setbacks, comebacks, and perseverance from our favorite lifters. These setbacks can take many forms, but Jared Maynardâs extraordinary story exists in a league of its own. Over the course of a few short weeks, a rare autoimmune disease took Jared from being a young, strong, healthy man in his early 30s to being on life support in the intensive care unit. With survival odds worse than the flip of a coin, Jared fought his way out of the ICU and started training right away. The major difference is that his training program involved re-learning how to eat, sit up, and roll over before he could focus on squat, bench, and deadlift. Barely more than one year removed from life support, Jared was back on the powerlifting platform setting PRs and deadlifting over 500lbs. In this episode, Jared shares his incredible story with Omar and Dr. Trexler, and talks about how years of lifting likely saved his life and set him up for a remarkable recovery.
00:00 Not talking crap about our guest today as part of our Iron Culture apology tour
02:12 Introducing our guest Jared and his journey
10:40 The potential recurrence of mononucleosis and Jaredâs plan if it does
14:49 Treatment and testing modalities
21:52 The crucial role of lifting in Jaredâs journey and the gradual process of recovery
32:13 Restoring activities of daily living
41:25 Jaredâs mental challenges and stoicism
50:40 Getting back into training and competing a year later
1:02:08 Setting the example to motivate and the recalibration of perspective
1:12:11 Jaredâs study of stoicism
1:15:35 Where to find Jared and whatâs next for him
Instagram @jared.rebuild_stronger https://www.instagram.com/jared.rebuild_stronger/
Rebuild Stronger Website https://www.rebuildstrongeronline.com/
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The most dynamic Iron Culture duo is back in action. In this episode, Omar and Dr. Trexler talk all about pain, injury, and factors that impact the relationship between them. Back in the day, most lifters were all-in on the âCartesianâ or âbiomedicalâ model of pain, which posits that pain is a simple, reliable indicator of damaged tissue causing nociceptors to send a âpain signalâ to the brain. Nowadays, the âbiopsychosocialâ and âfear-avoidanceâ models are all the rage in the evidence-based lifter circles. These models are a major upgrade, but there are still some pervasive misunderstandings and misinterpretations of these models in the lifting world. In this episode, Omar and Dr. Trexler try to provide some clarity on the matter using research, anecdote, and a decade-old textbook on Dr. Trexlerâs bookshelf.
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The trio is back, and this time to discuss the science of saturated fat. For decades, saturated fat was widely blamed for a dramatic rise in rates of obesity and heart disease. In recent years, that narrative has been challenged by proponents of increasingly popular ketogenic and carnivorous diets. For many, the back and forth on this topic is dizzying, and confusing. Fortunately, we have Dr. Trexler to walk us through several recent studies to help determine if saturated fat is actually inherently more fattening than other fat sources, either via its impact on energy expenditure or appetite, and then how it plays out in the real world, and finally, to discuss what you need to know, and what - if anything - you should change about your diet.
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When people think of âgood coachingâ in the evidence-based community their first thoughts are often related to whether or not the coach is up to date with the science and whether they use pseudoscience in practice. So does that mean that every coach from the 1990s and prior was a bad coach? Is good coaching actually determined by the methods you use, or something else? Can you be a bad coach while also being up to date with science? In this classic duo episode, Omar and Eric dive into the key qualities they think good coaches possess, and explain why the methods you use are not the same as the skills of delivering, implementing, adapting, and communicating them or the motivations behind your efforts to do so.
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One of the most common recommendations a personal trainer or dietitian might make to someone embarking on a weight loss journey, is to drink more water. Itâs a basic behavioural recommendation, like going on walks, eating more fruit, vegetables and lean protein, adopting a consistent sleep schedule, and engaging in regular exercise; all solid recommendations. Being hydrated is certainly important for health, wellbeing and performance, but is there actually evidence that drinking water will aid weight loss? Tune into this deep dive by Dr Trexler as he breaks it down and explains why drinking more water is great advice, but probably not for the reasons you think.
00:00 Please send us your sugar-alcohol protein bars
08:29 A segue to the topic: some alternatives to sugar-alcohols and what do if you catch Trexler eating a bunch of protein bars
MASS Research Review https://massresearchreview.com/
14:21 The throwaway line: drink water to lose weight
Chen 2024 Water Intake and Adiposity Outcomes among Overweight and Obese Individuals: A Systematic Review and Meta-Analysis of Randomized Controlled Trials https://pubmed.ncbi.nlm.nih.gov/38612997/
Khil 2024 Water intake and obesity: By amount, timing, and perceived temperature of drinking water https://pubmed.ncbi.nlm.nih.gov/38662725/
35:07 Trexlerâs biggest takeaways from the article
42:50 Tying it together with some Iron Culture lore
50:26 How much water do you actually need to drink?
Yamada 2022 Variation in human water turnover associated with environmental and lifestyle factors https://pubmed.ncbi.nlm.nih.gov/36423296/
1:03:15 Meal pre-loading?
Parretti 2015 Efficacy of water preloading before main meals as a strategy for weight loss in primary care patients with obesity: RCT https://pubmed.ncbi.nlm.nih.gov/26237305/
Van Walleghen 2007 Pre-meal water consumption reduces meal energy intake in older but not younger subjects https://pubmed.ncbi.nlm.nih.gov/17228036/
1:07:38 Closing out
- Montre plus
