Stronger with Time

🌐 Visit → tonyboutagy.com 📲 Follow us on Instagram → @tonyboutagyMost people who train seriously have heard the word periodization. Far fewer understand what it actually is, or how to use it to get more out of every year of training. In this episode, one of the world's leading authorities on the subject explains exactly that.Professor Greg Haff completed his doctoral work under Professor Mike Stone and has spent decades coaching Olympic athletes, military personnel, and elite strength and power competitors, while publishing over 270 scientific papers on training adaptation.In this episode, Professor Haff explains:What periodization actually is and why confusing it with programming is one of the most common mistakes coaches make. Periodization is an organisational strategy. Programming tactics sit inside it.The three periodization models — parallel, sequential, and emphasis — and how goal and context determine which one applies. Most recreational trainees benefit from an emphasis model that varies the density of each training component across the week.Why changing the training stimulus every four to five weeks prevents accommodation and what the historical and modern research consistently shows about why this window matters for large muscle group exercises.How to sequence strength and hypertrophy phases to get more from both and why building work capacity first creates the foundation to lift heavier loads when you return to hypertrophy training.Why volume load, not set count, is the primary driver of muscle growth and how cluster sets allow higher loads, greater time under tension, and more total work than conventional set structures.How psycho-emotional stress compounds training stress and why periodization is fundamentally a fatigue management process that has to account for everything happening in a person's life, not just what happens in the gym.Key insight:The best coaches in the world have always used some form of periodization model. Most of them are not on social media. Structure, variation, and fatigue management remain the variables that separate long-term progress from stagnation.Topics: periodization, program design, hypertrophy, strength training, phase potentiation, cluster sets, training volume, fatigue management, periodized nutrition, long-term athlete development, resistance training, ageing and exercise

🌐 Visit → tonyboutagy.com 📲 Follow us on Instagram → @tonyboutagyThe most prominent female fitness trends of 2025-26 are heavily hormone-focused. Most take something biologically true — estrogen fluctuates, cortisol rises during exercise, fibre type differs slightly between sexes — and build a training recommendation on it that the outcome data doesn't support. In this episode, Dr. Lauren Colenso-Semple evaluates those claims against the actual research.Dr. Lauren Colenso-Semple completed her PhD at McMaster University under Professor Stuart Phillips, with research focused on strength and performance across the menstrual cycle.In this episode, Dr. Colenso-Semple explains:How cycle syncing originated — from rodent ovariectomy studies involving full hormone shutdown to a large extrapolated jump into popular fitness content, and why reducing training volume to align with cycle phase conflicts with what the research shows about long-term volume-dependent adaptation.Why sex differences in muscle fibre type are very small in untrained people, adaptive with training, and secondary to athlete calibre — and why mitochondrial adaptations are a function of training status rather than sex or age.Why mechanical tension, achievable across a wide rep range, is the primary driver of muscle growth — and why this holds in men and women of all ages and training backgrounds.The distinction between Cushing's syndrome, a clinical condition involving chronic cortisol dysregulation, and the normal acute cortisol fluctuations that occur during exercise — and why conflating the two has led to widespread unnecessary concern.Why the kisspeptin argument against fasted training for women comes from a rodent receptor deletion model and has not been replicated in human outcome studies.Why the apparent ease with which male partners lose weight relates to differences in body size and maintenance calorie intake rather than a sex-specific metabolic response to a calorie deficit.Key insight:The hormone-based fitness claims most frequently directed at women tend to draw on mechanistic or animal data, while the long-term outcome studies — which address the actual goals of interest — show no meaningful sex difference in training response.Topics: cycle syncing, zone two training, female fitness trends, fibre type, mitochondria, cortisol and exercise, Cushing's syndrome, fasted training, kisspeptin, rep ranges, menopause and strength training, estrogen and muscle, mechanical tension, training volume, calorie deficit, evidence-based training

🌐 Visit → tonyboutagy.com 📲 Follow us on Instagram → @tonyboutagyThe fitness industry prescribes energy deficits without the framework to know when a deficit becomes harmful. This episode translates the RED-S research into practical application for coaches and individuals working on body composition.In this episode we breakdown the key concepts from recent conversation with Professor Louise Burke.You'll learn:Low energy availability (the exposure) vs RED-S (the syndrome) - why the distinction matters for applicationWhy fat-free mass, not total body mass, is the correct denominator for energy availabilityThe threshold numbers: ~20 cal/kg FFM for fat loss; below 15 cal/kg FFM where adverse consequences are well-documentedWhich systems are affected first - reproductive hormones and bone turnover - and how quickly (research shows within five days at 10 cal/kg FFM, which the transcript notes is not uncommon in physique sport)Why metabolic adaptation is a consequence of RED-S, not a separate phenomenonWhat the evidence does and doesn't support on sex differences in fasted exercise, including the kisspeptin hypothesisWhy fasted training and low energy availability are not the same thingThe 2023 RED-S questionnaire toolkitPrevention: returning to energy balance (30–40 cal/kg FFM) one to two days per weekRecovery: stepwise calorie increase and gastrointestinal adaptationKey insight: Low energy availability is the exposure; RED-S is the syndrome. Fasted training is not the same as low energy availability. These distinctions are foundational to applying this research correctly.Topics: RED-S, low energy availability, fat-free mass, metabolic adaptation, fasted training, kisspeptin, body composition, physique sport, Louise Burke, Stronger With TimeRESOURCES & LINKSDr Tony Boutagy → tonyboutagy.comProfessor Louise Burke - Australian Catholic University → https://www.acu.edu.au/research-and-enterprise/our-research-institutes/mary-mackillop-institute-for-health-research/our-people/louise-burkeIOC RED-S CAT 2 Tool (PDF) → https://stillmed.olympics.com/media/Documents/Beyond-the-Games/Health-and-Wellbeing/2023-IOC-REDS-CAT2.pdfIOC 2023 Consensus Statement on RED-S → https://pubmed.ncbi.nlm.nih.gov/37752005Sports Dietitians Australia → https://www.sportsdietitians.com.auPolar H10 heart rate monitor → https://www.polar.com/en/sensors/h10-heart-rate-sensor

🌐 Visit → https://tonyboutagy.com/📲 Follow us on Instagram → @tonyboutagyIf you've experienced unexplained fatigue, lost your period, or can't build muscle despite training hard - this episode will help you understand why.Professor Louise Burke - IOC expert panel member on RED-S - explains the complexity behind low energy availability, why it's being oversimplified on social media, and why context matters more than rigid rules.You'll learn when energy deficit becomes problematic, which body systems are affected first (and why), why stress makes everything worse, and whether the fasted training fears are actually supported by evidence.We also discuss Professor Burke's groundbreaking Melbourne study using the only metabolic chamber in the Southern Hemisphere to compare diet-induced versus exercise-induced energy deficits.In this Episode:The difference between low energy availability (exposure) and RED-S (syndrome)Why energy deficits aren't always intentional (training volume, time constraints, budget)Which body systems are affected: reproductive, bone, GI, metabolism, performanceWhy some systems shut down before others (evolutionary perspective)Stress as a major amplifier of symptomsRED-S CAT 2 clinical diagnosis tool (requires medical expertise, not self-diagnosis)Evolution from Female Athlete Triad to RED-S (males affected, multiple systems involved)Cultural issues in endurance sports (Tour cyclists surviving on coffee for 7-hour rides)Does the method of creating deficit matter? Diet vs exercise-inducedMelbourne metabolic chamber study: comparing both methods (results expected 2027)Fasted training controversy: insufficient evidence for rigid rulesSex differences in sensitivity to energy rhythm (confounded by stress factors)Louise's perspective: better to exercise fasted than not exercise at allKey insight:RED-S is far more complex than simple numerical thresholds. Context, individual variation, stress, and the method of creating deficit all matter. Oversimplified social media advice may cause more harm than good.Melbourne Study:Professor Burke is recruiting runners, triathletes, race walkers (50k+/week) for a study comparing exercise-induced vs diet-induced energy deficit using the only metabolic chamber in the Southern Hemisphere. Results expected 2027. Contact  ⁠agility@acu.edu.au for recruitment information.Go straight to the redcaps screening tool   https://redcap.link/acu-agilityTopics: energy deficit, undereating, overtraining, hormones, bone health, metabolic adaptation, female athlete triad, amenorrhea, stress fractures, fasted training, sports nutrition

What started as 6 planned episodes became 31 conversations throughout 2025. This is my year-end reflection on the final five conversations - and the one consistent message that emerged from every expert.The core message:Individual variation matters more than sex-specific protocols. Training principles apply to human physiology, not gender categories. What you do consistently shapes who you become.Key insights from 2025:💡 You are what you do repeatedly" - Professor Sophia Nimphius. Your training history shapes your physiology more than your sex does.💡 Research + coaching perspectives both matter. Research shows what works on average. Coaching finds what works for you.💡 The public message has become too complex. 80% of women aren't lifting weights, yet the advice has become increasingly segmented and contradictory.💡 Training frequency: The pre-steroid era (1800s-1950s) used 2-3x per week full body training. Modern muscle physiology supports this approach for natural lifters.💡 Menopause care is patient-centered. History, symptoms, and goals drive treatment decisions - not blanket "every woman should" recommendations.💡 Low energy availability is the hidden epidemic in midlife women. Even 35-year-olds are showing perimenopausal symptoms from chronic under-fueling.Brief highlights from 5 conversations:🎙️ Round Table (Paul Laursen, Jake Doleschal, Dana Lis): How strength, endurance, and nutrition interact in real life. Why zones are coaching prescription tools, not gender-specific protocols.🎙️ Jake Doleschal: Training frequency and the muscle fiber-specific nature of hypertrophy. Why first sets give you 50% of stimulus with diminishing returns after.🎙️ Dr. Nadya Chami: What happens in a menopause consultation. Individualized hormone therapy decisions based on patient needs and contraindications.🎙️ Professor Abbie Smith-Ryan: Context matters for fasted training. Fueling around training sessions for better body composition. Why short-term studies miss real-world complexity.🎙️ Professor Sophia Nimphius: Research quality issues (85% of top meta-analyses contain errors). The circle of resistance training life. Why more overlap exists than difference between male and female training responses.📅 2026 plans: Body composition focus, continued women's health and performance, and the experts doing the actual research.If you found this valuable, follow for more evidence-based insights in 2026.

📲 Instagram → https://www.instagram.com/tonyboutagy/🎧 Watch on YouTube → https://www.youtube.com/@tonyboutagy-PhD/Professor Sophia Nimphius's research on training adaptation reveals that your training history shapes your physiology more than demographic categories. Her work bridges exercise science research with practical coaching application.In this episode, you'll discover:Research quality in exercise science: why 85% of influential meta-analyses contain calculation errorsWithin-group variation versus between-group differences in male and female training responses"You are what you do repeatedly" - how consistent training patterns shape physiologyThe circle of resistance training life: cycling through muscle mass, strength, and work capacity phasesWhy it takes 3-4 years of consistent training to understand your true capabilitiesProgramming for muscle mass: higher reps, total work, and learning what "heavy" meansCluster sets and rest redistribution as alternatives to traditional set structuresPower decline with age: maintaining fast movements across the lifespanBone health: both impact and tension stimulate adaptation (with satiation effects)Multimodal and multi-directional movement for comprehensive developmentMuscle imbalances: practical screening and monitoring changes over timeKey insights:Training principles apply to human physiology rather than gender categories. Within-group variation (differences between individuals of the same sex) exceeds between-group differences (average differences between sexes). Your training history - what you do consistently over years - determines your physiological adaptations.The "circle of resistance training life" applies universally: build muscle mass, maximize strength and efficiency, develop work capacity, repeat. Cycle through 3-8 week blocks of each phase across your entire training lifespan.Guest:Professor Sophia Nimphius is Pro Vice-Chancellor of Sport at Edith Cowan University, with over 20 years of experience bridging research and elite sports coaching in surfing, softball, and strength sports.Resources:Professor Sophia Nimphius → https://www.docsoph.com/Instagram → @docsophIf you found this valuable, follow for more evidence-based insights.

📲 Instagram → https://www.instagram.com/tonyboutagy/🎧 Watch on YouTube → https://www.youtube.com/@tonyboutagy-PhD/Professor Abbie Smith-Ryan's research reveals why individual variation in women's training and nutrition response matters more than group averages - and why rigid protocols often miss the mark.In this episode, you'll discover:Why menstrual cycle training needs vary dramatically between women (and how to track your own patterns)When body composition measurements provide useful feedback versus create psychological problemsCreatine for women: dosing, timing, and benefits for muscle, cognition, and bone healthStrategic fueling around training sessions while maintaining fat loss goalsLow energy availability in midlife: why some women eating 1,400 calories still aren't fueling adequately around trainingHow chronic energy deficit suppresses metabolic rate by 300-400 caloriesCase studies: world champions who fuel strategically versus chronic under-fuelers with suppressed metabolismKey insights:Individual response to menstrual cycle changes varies significantly - some women need training modifications, others don't notice differences. Track your own patterns rather than following rigid protocols.You can maintain calorie restriction for fat loss while still fueling strategically around training sessions. The timing matters for body composition and metabolic health.Guest:Professor Abbie Smith-Ryan is co-director of the Applied Physiology Laboratory at UNC Chapel Hill, with 230+ peer-reviewed publications on women's health, performance nutrition, and body composition.Resources:Professor Abbie Smith-Ryan → @asmithryan (Instagram)Professor Abbie Smith-Ryan - Website → https://asmithryan.com/Applied Physiology Laboratory → https://exss.unc.edu/If you found this valuable, follow for more evidence-based insights.

📲 Instagram → https://www.instagram.com/tonyboutagy/🎧 Watch on YouTube → https://www.youtube.com/@tonyboutagy-PhD/Most menopause advice on social media comes from doctors who don't see patients. Dr. Nadya Chami actually works with menopausal women every single day.In this conversation, she explains what really happens in a menopause consultation, how specialists make treatment decisions, and why individualised care matters more than blanket protocols from social media.What you'll learn:What actually happens during a menopause consultation and how treatment decisions are madeThe 2002 study that scared a generation off hormone replacement therapy (HRT) - and what's changed sinceBody-identical hormones vs. synthetic: why type and delivery method matterTestosterone therapy for women: research on libido, muscle, bone, and cognitionWhy sex hormone binding globulin (SHBG) can block testosterone effectivenessNon-hormonal options when menopausal hormone therapy isn't suitableSleep solutions: night sweats vs. anxiety vs. bladder issuesWhy body composition changes are the hardest menopause problem to solveWhether you can stay on hormone therapy indefinitely or should wean off at 60Key insight: Menopause care requires working with a specialist who considers your complete medical history and individual circumstances - not following rigid social media protocols.Guest: Dr. Nadya Chami is a specialist obstetrician and gynecologist working exclusively in menopause gynecology at Prince of Wales Private Hospital and the Menopause Hub (Royal Hospital for Women).Resources:Dr. Nadya Chami → drnadyachami.com.auThe Menopause Hub → Royal Hospital for Women, SydneyIf you found this valuable, follow for more evidence-based insights.

How often should you train each muscle group for optimal growth?Strength coach Jake Doleschal breaks down why training muscles 2-3x per week with moderate volume beats once-weekly high-volume approaches - and how it aligns with modern science.You'll learn:Why twice weekly training outperforms once weekly with high volumeHow muscle growth peaks in 48 hours but atrophy starts by day 5Why 3-4 sets per week maintains muscle but doesn't build itHow to structure AAA vs. ABA workout splitsThe enhanced lifter problem: copying 40-set workouts leads to overtrainingCNS fatigue and practical recovery strategiesExercise selection: start with muscle regions, not set countsPractical guidelines: 8-16 exercises per sessionWhy rep ranges (5-15) don't significantly impact hypertrophyWhat pre-steroid era bodybuilders got right about sustainable trainingIf you found this valuable, subscribe for more evidence-based training insights and share this episode with someone who's spinning their wheels in the gym. 📲 Follow us on Instagram → @tonyboutagy

This is a special round table episode where three experts come together to discuss what most podcasts keep siloed: how to integrate strength training, endurance work, and nutrition into one cohesive program.You'll learn:Why training frequency (2-3x/week) matters more than total volume for most peopleThe non-linear dose response: first sets give the most stimulusHow to balance high and low intensity without constant fatigueWhy males and females respond similarly to the same training programsWhen to train fasted vs fed (and why gut health matters)Protein targets: 1.7-2.5g/kg body weight for muscle gain or fat lossZone two vs HIIT: when to use each and how to balance them30/30 intervals: why short work/rest periods optimize adaptationsThe parallels between interval training and cluster sets in the gymHow to structure your week for strength + endurance without interferenceWhat changes for athletes over 55-60 years oldKey insight: Context always matters more than rigid rules. Training adaptation equals molecular signaling plus autonomic balance. 📲 Follow me on Instagram → @tonyboutagy

📲 Follow me on Instagram → @tonyboutagyThis is a summary episode of Stronger With Time, where I look back at eight powerful conversations and share the key insights I took away as both a coach and lifelong student of exercise science.You'll learn:Why vitamin D testing matters and how to use sensible sun exposure (Prof. Michael Holick)How to gradually increase fiber intake without digestive distress (Dr. Joanna McMillan)Why resistance training programs don't need to be different for men and women (Prof. William Kraemer)Where to find reliable menopause information beyond social media (Dr. Jen Gunter)When to get a DEXA scan and how resistance training builds bone site-specifically (Dr. Jared Merkin)Which wearables actually track sleep well and why recovery strategies matter (Prof. Shona Halson)How short interval training compares to steady-state for glucose control (Prof. Jonathan Little)Why most cardio and strength advice for women is missing critical nuance (Dr. Alyssa Olenick)Whether you're coaching women, training through menopause, or simply want clarity in a noisy fitness landscape - this episode gives you the science-backed highlights from eight world-class experts.

What if most of the "female-specific" training advice you're hearing is missing the bigger picture?Dr. Alyssa Olenick breaks down the science of what actually works for women - from cardio programming to strength training protocols - and why the fear-based messaging around hormones, cortisol, and zone training is doing more harm than good.You'll learn:How to spot BS fitness advice (hint: absolutes and fear-mongering are red flags)Why cardio isn't "destroying your hormones" - and what poor programming actually looks likeThe truth about zone training: when it matters and when you can ignore itHow to balance HIIT, steady-state, and recovery across your weekWhy the "cortisol from cardio" fear is overblown (and what actually raises cortisol)What makes a good resistance training program (spoiler: it's not just 5x5 heavy lifting)The menopause training narrative: why 8-12 reps still workHow to train with intention instead of just "going hard" every sessionWhy fitness status matters more than sex differences in training response

What if small, precise changes in food, walking, and training could restore glucose control?Prof. Jonathan Little shares practical, evidence-based strategies from his lab on how carb restriction, exercise intensity, and ketones affect metabolic health.You’ll learn:• A research-tested 12-week very-low-carb model for type 2 diabetes remission (PMID 33653718)• Why fasting insulin rises 5–10 years before glucose does (PMID 22644836)• How a 10–15 min walk ≈ 30 min after meals flattens glucose spikes (PMID 35985050)• What LDL particle size reveals about cardiovascular risk (PMID 34159352)• When metformin supports - not blunts - exercise benefits• The science behind pre-sleep protein for morning glucose control• Why HIIT and moderate training both improve insulin sensitivity• The real impact of exogenous ketones as fuel and signal (PMID 27475046)

What really drives better sleep and recovery?Prof. Shona Halson - one of the world’s most respected experts in the field - shares what decades of research actually supports, and what to ignore.You’ll learn: • Why 8 hours is a useful guideline, but consistency matters more • How naps and “non-sleep deep rest” can help (and when they hurt) • Which wearable data is reliable vs. misleading • The role of hormones, perimenopause, and menstrual symptoms in sleep • Why evening meals, alcohol, and caffeine disrupt rest more than we think • How stress, low energy availability, and overtraining impair recovery • The truth about compression, ice baths, and sauna use • When protein timing and presleep nutrition really make a difference

How strong are your bones - and how do you know?In this conversation with Dr. Jarrod Meerkin, we break down what DEXA scans really tell us, how bone density changes across the lifespan, and the role of exercise, genetics, and lifestyle in protecting against osteoporosis.You’ll learn: • When peak bone mass is reached and why it matters • The differences between DEXA, QCT, PQCT, and ultrasound scans • Why the lumbar spine and hip are the gold standards for assessment • How genetics, hormones, and nutrition shape bone density • The silent nature of bone loss and why scans matter before age 70 • What T-scores and Z-scores actually mean • How resistance and impact training influence bone health • Why calibration matters when comparing DEXA results

Why are women still bombarded with misinformation about their health? From “bioidentical” hormones to probiotics, celebrity-endorsed supplements, and viral myths, Dr. Jen Gunter helps us separate fact from fiction.You’ll learn: • Why misinformation spreads so easily in women’s health • How mouse studies and anecdotes mislead the public • The truth about vaginal health, probiotics, and lubricants • What “bioidentical hormones” actually are - and aren’t • How doctors determine hormone therapy dosing • When hormone therapy helps, and when it doesn’t • Why sleep, nutrition, and exercise still matter most • How language in medicine (like “ovarian failure”) is evolving

What does the science really say about resistance training for women?In this conversation with Professor William Kraemer, one of the most cited exercise scientists in history, you’ll hear the lessons from five decades of research on strength training, program design, and women’s responses to training.You’ll learn: • Why women can safely follow the same strength principles as men • What the early large-scale female training studies actually showed • How symptomatology (sleep, hot flushes, joint pain) shapes menopause training • The fundamentals of sets, reps, loads, and rest for women • How to use flexible non-linear periodisation in real life • Why context, not theory, determines whether training advice worksResources & Links: • Kraemer WJ et al. — Evolution of resistance training in women: History and mechanisms for health and performance → https://doi.org/10.1016/j.smhs.2025.01.005 • Kraemer & Fleck — Designing Resistance Training Programs → https://www.amazon.com/Designing-Resistance-Training-Programs-4th/dp/0736081704

Most people think “gut health” means buying probiotics or avoiding certain foods. But what does the science actually say? In this episode, Dr. Joanna McMillan breaks down the myths, the evidence, and the everyday practices that make the biggest difference.You’ll learn: • What normal gut function actually looks like (and when to worry) • Why constipation is more serious than most realise • How to interpret bloating, gas, and gut noises without overreacting • The different types of fibre - and why resistant starch is so important • Why both plant and animal foods matter for long-term health • The facts about fermented foods, probiotics, and postbiotics • Foods and additives that damage gut health • How to approach FODMAPs and fibre intolerance safely🎓 Join the 9-Week Science of Thriving Course →⁠ https://scienceofthriving.com.au⁠📲 Follow us on Instagram → @tonyboutagy

Our first Ask Me Anything podcast is here.I answer your questions on training through menopause and beyond - from resistance training and protein timing to Zone 2, mitochondria, and training into your 70s and 80s.In this session, we cover:✔️ Do we really lack female-specific resistance training research?✔️ “Stay in your lane” - the danger of experts giving advice outside their field✔️ Zone 2 training, mitochondria, and whether cardio helps or hinders hypertrophy✔️ Lactate threshold, heart rate, and why lab testing still matters✔️ Carbs vs fat for endurance - and why elite athletes aren’t the best model for most women✔️ Protein timing in women - does it differ from men?✔️ Light vs heavy weights, and why variety still matters✔️ Testosterone and postmenopausal training✔️ Sarcopenia, injuries, rotator cuff issues, and training into your 70s and 80s✔️ Tai chi, gymnastics, and “second-tier” activities for longevity✔️ The truth about wearables, recovery scores, and training frequency mythsWe didn’t get to every question this time, so another Q&A will be recorded soon. If you’d like to submit one, leave it in the comments or send it through on Instagram.📲 Follow us on Instagram → @tonyboutagy🎓 Join the 9-Week Science of Thriving Course → https://scienceofthriving.com.au

Vitamin D is one of the most debated topics in health: sunlight vs supplements, safe levels, deficiency risks, and whether it truly impacts conditions beyond bone health.In this conversation with Professor Michael Holick, I explore: • The difference between vitamin D from sunlight vs supplements • Why 40–60 ng/ml (100–150 nmol/L) may be the true “optimal” range • The role of vitamin D in bone health, pregnancy, immunity, and muscle • Why deficiency is linked to preeclampsia, diabetes, and autoimmune disorders • The controversy around guidelines, testing, and “normal” ranges • The evidence for and against megadosing in autoimmune conditions • How sunlight influences health beyond vitamin D (endorphins, nitric oxide, mood) • What Professor Holick himself does daily - from supplementation to training for marathons at age 79Whether you’re a coach or simply someone trying to make sense of vitamin D confusion, this episode will give you clarity from the world’s foremost expert.🎓 Join my 9-Week Science of Thriving Course →⁠ https://scienceofthriving.com.au⁠ 📲 Follow us on Instagram → @tonyboutagy