Fit For Science

Stephan Reichl and Rob ter Horst

Two scientists discuss how they live their best life, using science, data, tech, wearables, and systems. Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise and enable everyone to become their best N-of-1. The Quantified Scientist (Rob): youtube.com/TheQuantifiedScientist Stephan's Website: http://polytechnist.me

  1. Stanford's Aging Fish, Tracking Wishlist, Placebo Blueberries & Measuring Body Composition - Q1’26 Updates (Fit For Science Episode 15)

    APR 27

    Stanford's Aging Fish, Tracking Wishlist, Placebo Blueberries & Measuring Body Composition - Q1’26 Updates (Fit For Science Episode 15)

    In this episode, Rob and Stephan explore the intersection of lifespan research, the exposome, and daily health tracking, tackling everything from aging fish and AI stool analysis to passive exercise tracking and body composition scales. 📝Summary In episode 15 of Fit For Science, Rob and Stephan explore the intersection of lifespan research, the exposome, and daily health tracking, tackling everything from fish behavior to body composition. The hosts, both biological data scientists, dive into a recent Stanford study published in Science that tracked the lifetime behavior of short-lived fish to uncover insights into aging, connecting these methods to human wearable technology and exposome tracking. They transition into discussing the potential benefits and practical hurdles of tracking daily bowel movements using AI and the Bristol stool chart compared to infrequent microbiome testing. The conversation also highlights wishlist features for wearables, specifically the ability to quantify passive exercises like saunas and cold plunges. A personal anecdote about a sudden burst of energy and reduced sleep need following the consumption of freeze-dried blueberries sparks a debate on whether this was due to antioxidants reducing neuroinflammation or simply project-induced excitement. Finally, they compare at-home bioelectrical impedance smart scales to clinical measurements, detailing the nuances between lean mass, visceral fat, and the importance of long-term trend averaging. ⏳Chapters 00:00:00 Fish Aging Study: Discussing a Stanford study connecting fish with wearables 00:04:13 The Exposome: Exploring how environmental exposures are tracked 00:12:05 Stool Tracking vs. Microbiome Analysis 00:19:33 Quantifying Passive Exercise: A wishlist discussion 00:25:30 The Blueberry Effect and Sleep: Stephan's placebo experience 00:34:30 Body Composition and Smart Scales 00:43:03 Advanced Body Composition Measurement Techniques 00:46:07 Lean Mass vs. Visceral Fat 00:51:22 Data Averages and Trends 📚Resources LinkedIn post about Stanford's aging fish study  Watching a lifetime in motion reveals the architecture of aging  Youthful antics predict lifespan — at least for these fish  Paper: Lifelong behavioral screen reveals an architecture of vertebrate aging  Amazon's failed body composition app: The science behind the Halo Body feature  Academic publishing: Open Access vs Paywalls  Actigraphy  An atlas of exposome–phenome associations in health and disease risk  Exposome  Snyder Lab - Exposome  A Network-Based Framework for Assessing the Pathobiological Impact of Environmental Exposures on Human Development & Health - Salvo D Lombardo CeMM - Research Center for Molecular Medicine (where we work)  Massive biomolecular shifts occur in our 40s and 60s  Microbiome  Bristol Stool Chart: Types & What They Mean  Zettelkasten system (Stephan uses his email inbox) Body Scan | Withings Europe  The 10 Best Ways to Measure Your Body Fat Percentage  The Evaluation of a Mass Media Campaign Aimed at Weight Gain Prevention Among Young Dutch Adults  Sustained visceral fat loss is associated with attenuated brain atrophy and improved cognitive function in late midlife …There is more: complete show notes here 🎙️About Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise and enable everyone to become their best N-of-1. Learn more and subscribe on your favorite platforms: YouTube Spotify Apple Podcasts Amazon Music Collection of all show notes ⚠️Disclaimer: This podcast represents our own opinions and is for informational purposes only. It does not constitute medical or financial advice or a professional relationship.

    56 min
  2. The Silicon Valley Peptide Craze: Trust the Science, Not the Influencer (+ Hierarchy of Evidence) (Fit For Science Episode 14)

    APR 21

    The Silicon Valley Peptide Craze: Trust the Science, Not the Influencer (+ Hierarchy of Evidence) (Fit For Science Episode 14)

    In this episode of Fit for Science, Rob and Stephan use the recent Silicon Valley "peptide craze" as a case study to explore how to critically evaluate health claims and navigate the scientific hierarchy of evidence. 📝Summary In episode 14 of the Fit for Science podcast, biological data scientists Rob and Stephan delve into the growing trend of Silicon Valley tech elites self-injecting unregulated peptides, using this phenomenon as a launchpad to discuss how to critically assess health and lifestyle claims. They begin by demystifying what peptides actually are, providing examples ranging from life-saving insulin and GLP-1 agonists to harmful spider venom, while warning against the dangers of untested, gray-market substances. The core of the episode breaks down the hierarchy of scientific evidence, guiding listeners from the weakest forms, such as second-hand anecdotes and social media influencers, up through epidemiological observational studies, prospective studies, and rigorous randomized controlled trials, finally culminating at the pinnacle: meta-analyses. Furthermore, they offer practical advice on safely running personal health experiments using wearables, emphasizing the importance of systematic testing, understanding biological mechanisms versus actual tested outcomes, and relying on high-quality institutional guidelines over viral internet trends. ⏳Chapters 00:00:00 Unpacking the Silicon Valley peptide craze 00:04:50 Defining Peptides: Understanding small proteins 00:17:18 The Hierarchy of Evidence: Why anecdotes and personal experiences sit at the bottom 00:26:59 Epidemiological Studies: The value and limitations of observational data 00:32:45 Prospective Studies: Planning health research and utilizing wearable data 00:35:08 Randomized Controlled Trials: The gold standard for testing interventions and eliminating bias 00:43:24 Meta-Analyses: Combining data to form medical consensus and guidelines 00:46:29 Evaluating Sources: Disentangling the message from the messenger 00:52:17 AI in Health Research: Tips and pitfalls when using frontier models for scientific inquiries 00:58:10 Community Q&A: How to safely use wearables to run systematic self-experiments 01:07:11 Final thoughts on evaluating risks and a recap of the evidence hierarchy 📚Resources ‘Chinese Peptides’ Are the Latest Biohacking Trend in the Tech World - The New York Times Silicon Valley's new miracle drug Eric Topol - The Peptide Craze - Ground Truths  Economist - Want to hack your body with peptides? If only the science agreed  ‘People are turning themselves into lab rats’: the injectable peptides craze sweeping the US | The Guardian ProPublica - A Las Vegas Festival Promised Ways to Cheat Death. Two Attendees Left Fighting for Their Lives.   Hierarchy of evidence  Survivorship bias (incl. airplane bullet holes anecdote)  UK Biobank  NHANES - National Health and Nutrition Examination Survey | CDC  Meta-analysis - Examine  VIP medicine aka VIP syndrome aka VIP effect  Edison Platform for science-based AI research Perplexity AI for research (you can select academic papers)   Eddy Burback - ChatGPT made me delusional  Principles from the episode Proteins are the smallest functional unit of life and peptides are just small proteins. …There is more: complete show notes here 🎙️About Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise and enable everyone to become their best N-of-1. Learn more and subscribe on your favorite platforms: YouTube Spotify Apple Podcasts Amazon Music Collection of all show notes ⚠️Disclaimer: This podcast represents our own opinions and is for informational purposes only. It does not constitute medical or financial advice or a professional relationship.

    1h 10m
  3. The $100 Genome: Genetic Risk Scores & Sequencing Babies (Fit For Science Episode 13)

    MAR 19

    The $100 Genome: Genetic Risk Scores & Sequencing Babies (Fit For Science Episode 13)

    Rob and Stephan explore the new reality of $100 whole genome sequencing, the actionable value of polygenic risk scores, and the ethical future of personalized genomic medicine. 📝Summary Biological data scientists Rob and Stephan discuss the implications of the newly achieved $100 whole genome sequencing milestone, comparing unbiased whole genome reads to popular genotyping consumer products like 23andMe. They delve into the mechanics of genome-wide association studies and polygenic risk scores, examining how genetics interact with lifestyle and environmental factors to influence disease probability. The hosts share their personal experiences with services like Nebula Genomics, 23andMe and Dante Labs, revealing how insights, such as a high genetic predisposition for elevated ApoB levels, can drive actionable dietary changes like reducing saturated fats. Finally, they explore the psychological barriers, data privacy concerns, and ethical considerations of integrating genomic sequencing into standard medical practice and newborn screening to create a proactive, Bayesian model of preventative healthcare. ⏳Chapters 00:00:00 The $100 Genome: Cost breakthroughs and historical perspective 00:07:41 Defining Sequencing: Genotyping consumer products vs. Whole Genome Sequencing 00:16:19 Polygenic Risk Scores: Predicting complex diseases using multiple genes 00:20:44 Nature vs. Nurture: How lifestyle pulls the trigger on genetic predispositions 00:23:17 Medical Implementation: Psychological anxiety and the actionability of genetic data 00:33:03 Personal Experiences: Reviews of Nebula Genomics, 23andMe, and Dante Labs 00:44:23 Actionable Insights: Modifying saturated fat intake based on ApoB percentiles 00:54:55 A Bayesian Healthcare Model: Combining genetics, demographics, and lifestyle 01:06:20 Ethical Explorations: The future of sequencing newborns and preventative screening 📚Resources Human Genome Project cost ~$3 Billion and took ~13 years (1990-2003) How to sequence the human genome - TED-Ed Video  Genetic disorder (monogenic i.e., single-gene cause)  Scrappy San Diego startup goes toe-to-toe with gene-sequencing giant Illumina Element Biosciences Eric Topol's X post about $100 Gneom  The cost of sequencing human genome has fallen from $100M to under $100 in approximately 25 years   The $100 Genome: Where’s the Limit?  Genome-wide association study (GWAS) Polygenic score (PRS) What are Polygenic Risk Scores (PRS) and how can they be used in healthcare?  Systematic comparison of family history and polygenic risk across 24 common diseases  > “In most diseases, including coronary artery disease, glaucoma, and type 2 diabetes, a positive family history with a high PRS was associated with a considerably elevated risk, whereas a low PRS compensated completely for the risk implied by positive family history.” > “In addition to capturing shared DNA, FH [family history] measures non-genetic exposures and behaviors shared by families” Nebula Genomics now DNA Complete with subscription model George Church (geneticist)  23andMe Dante Labs Promethease for DNA reporting Reference genome  Personalized genomics  Apolipoprotein B (ApoB)   The ‘thousand-dollar genome’: an ethical exploration | European Journal of Human Genetics (2013!) …There is more: complete show notes here 🎙️About Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise and enable everyone to become their best N-of-1. Learn more and subscribe on your favorite platforms: YouTube Spotify Apple Podcasts Amazon Music Collection of all show notes ⚠️Disclaimer: This podcast represents our own opinions and is for informational purposes only. It does not constitute medical or financial advice or a professional relationship.

    1h 3m
  4. How We Think About Supplements: What We Take, What We Ditched & Our Daily Protocols (Fit For Science Episode 12)

    MAR 2

    How We Think About Supplements: What We Take, What We Ditched & Our Daily Protocols (Fit For Science Episode 12)

    Rob and Stephan unpack their personal supplement protocols, discussing everything from creatine and omega-3s to the reasons they both ditched popular green powders like AG1. 📝Summary In this episode, biological data scientists Rob and Stephan explore the rationale, logistics, and science behind their personal supplementation protocols, emphasizing that supplements can never replace foundational habits like sleep, nutrition, and activity. The hosts dissect their differing approaches, with Rob detailing why he stripped his stack down to just creatine and whey protein after experiencing adverse effects like vivid dreams from L-theanine, while Stephan breaks down his extensive daily routine organized by morning, noon, and evening doses. They critically evaluate the utility and safety of compounds ranging from vitamin D3, K2, and magnesium bisglycinate to more experimental interventions like lion's mane and exogenous ketones. The conversation also covers the economics of tracking health, the potential heavy metal risks associated with popular green powders like AG1, downsides of complex blends, and the immunological implications of high protein diets. ⏳Chapters 00:00:00 Defining Supplements: Deficiencies versus performance optimization 00:04:11 The Fundamentals: Why pills cannot replace sleep and nutrition 00:09:26 Simplifying the Stack: Why Rob stopped taking pre-formulated mixes 00:15:16 Safety First: Water-soluble vitamins versus fat-soluble accumulation 00:18:23 The Morning Routine: Collagen, Vitamin C, and Electrolytes 00:26:38 The Top Three: Vitamin D3, K2, and Creatine Monohydrate 00:34:29 The Noon Routine: Lion's mane, selenium, and dark chocolate polyphenols 00:40:23 The Evening Routine: Magnesium bisglycinate, Omega-3s, and Glycine 00:46:03 The Cost of Supplementation: Budgeting for the quantified self 00:48:55 On-Demand Tools: Nicotine as a stimulant and wheat germ for spermidine 00:52:45 Protein Targets: Muscle maintenance, mTOR, and cardiovascular risk 00:58:50 Ditched Supplements: Why we stopped taking AG1 01:03:28 Future Experiments: Exploring exogenous ketones for metabolic flexibility 📚Resources Stephan's supplement stack & schedule  Creatine benefits, dosage, and side effects  Creatine: What It Does, Benefits, Supplements & Safety  What Every Vegan Should Know About Vitamin B12  Clarification: The avid listener might notice a contradiction: B vitamins are water-soluble, yet B12 is stored for years. Both can be true because it is continuously recycled in the liver, tightly bound to proteins, and too large for the kidneys to flush out. Iodine: Its Role in Thyroid Hormone Biosynthesis and Beyond  What is the effect of combining L-theanine with caffeine?  Vitamin D  Lion’s Mane Mushroom (Hericium erinaceus): A Neuroprotective Fungus with Antioxidant, Anti-Inflammatory, and Antimicrobial Potential  The Master Antioxidant: Glutathione  Magnesium Bisglycinate vs. Other Forms: Which Is Best?  Omega-3 Fatty Acids benefits, dosage, and side effects  How Much Spermidine Is in a Tablespoon of Wheat Germ?  High-protein diets increase cardiovascular risk by activating macrophage mTOR to suppress mitophagy   Fruits, Veggies, and Other Greens Supplements Review (Including Spirulina and Chlorella)  …There is more: complete show notes here 🎙️About Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise and enable everyone to become their best N-of-1. Learn more and subscribe on your favorite platforms: YouTube Spotify Apple Podcasts Amazon Music Collection of all show notes ⚠️Disclaimer: This podcast represents our own opinions and is for informational purposes only. It does not constitute medical or financial advice or a professional relationship.

    1h 6m
  5. Can and Should We Live Forever? Blue Zone Myths, Longevity Drugs & The 50/50 Genetics-Lifestyle Split (Fit For Science Episode 11)

    FEB 17

    Can and Should We Live Forever? Blue Zone Myths, Longevity Drugs & The 50/50 Genetics-Lifestyle Split (Fit For Science Episode 11)

    Rob and Stephan dissect the "Nature vs. Nurture" debate in longevity, debunk Blue Zone myths, and evaluate the potential of anti-aging interventions like calorie restriction and Rapamycin. 📝Summary In this episode, biological data scientists Rob and Stephan explore the realistic limits of human lifespan, starting with the outlier case of supercentenarian Jeanne Calment. They tackle the age-old "nature vs. nurture" debate, discussing recent research that suggests a near-even split in agency compared to previous estimates, while also highlighting the "Ig Nobel" findings that attribute many Blue Zone claims to poor record-keeping or fraud rather than biological superiority. The conversation moves through the biology of aging, touching on genome-wide association studies (GWAS) and specific genes like APOE and FOXO3, before transitioning to lifestyle interventions such as calorie restriction and the concept of hormetic stress. Finally, the hosts critically evaluate the current landscape of longevity pharmacology, including Metformin, GLP-1 agonists, and Rapamycin, ultimately concluding that while living forever remains scifi, maximizing healthspan through foundational lifestyle habits remains the most effective strategy. ⏳Chapters 00:00:00 Introduction: Limits of lifespan and the "Don't Die" philosophy 00:00:40 The Maximum Lifespan: Jeanne Calment and winning the genetic lottery 00:02:46 Blue Zones Debunked: The Ig Nobel Prize for bad record-keeping 00:04:22 Nature vs. Nurture: Genetics, epigenetics, and the blueprint of life 00:07:49 Genome Wide Association Studies (GWAS): How we link genes to traits 00:12:23 Longevity Genes: APOE and FOXO3 mechanisms 00:15:44 The 50/50 Split: Recent evidence on genetic vs. lifestyle influence 00:23:36 Calorie Restriction: Mouse models, immune suppression, and hormesis 00:34:16 The Vices: Smoking, obesity, alcohol, and the hygiene hypothesis 00:39:54 Longevity Drugs: Metformin and the risk of blunting exercise gains 00:44:46 Weight Loss Drugs: GLP-1 agonists, muscle loss, and heart rate effects 00:47:11 Rapamycin: Inhibiting mTOR and the balance of anabolism vs. catabolism 00:51:00 Senolytics: Clearing "zombie cells" with Quercetin and Dasatinib 00:56:37 Life Expectancy: Realistic predictions and the definition of a good life 📚Resources Jeanne Calment Bryan Johnson Ig Nobel Prize for Blue Zone debunking Nature versus nurture Huntington's disease Correction: life expectancy is 15-25 years after the onset of symptoms, often occurring in the 20s/30s Genome-wide association study (GWAS) Centenarian Multifaceted roles of APOE in Alzheimer disease FOXO3 Central dogma of molecular biology (DNA -> RNA -> protein) Heritability of intrinsic human life span is about 50% when confounding factors are addressed (2026) Estimates of the Heritability of Human Longevity Are Substantially Inflated due to Assortative Mating (Calico 2018) CRISPR gene editing Germline Stem cell FDA Approves First Gene Therapies to Treat Patients with Sickle Cell Disease (2023)  Do ‘blue zones,’ supposed havens of longevity, rest on shaky science?  Sleep, Nutrition, Activity, Purpose (SNAP framework) Calorie restriction Hormesis Supercompensation  Progressive overload  2-year calorie restriction study (CALERIE)  …There is more: complete show notes here 🎙️About Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise and enable everyone to become their best N-of-1. Learn more and subscribe on your favorite platforms: YouTube Spotify Apple Podcasts Amazon Music Collection of all show notes ⚠️Disclaimer: This podcast represents our own opinions and is for informational purposes only. It does not constitute medical or financial advice or a professional relationship.

    1h 9m
  6. How to Actually Read Your Sleep Data (Beyond Accuracy) + 7 Scientific "Cumulative Biomarkers" for Longevity (Fit For Science Episode 10)

    FEB 9

    How to Actually Read Your Sleep Data (Beyond Accuracy) + 7 Scientific "Cumulative Biomarkers" for Longevity (Fit For Science Episode 10)

    Rob and Stephan discuss why sleep stage trends matter more than absolute accuracy, review Oura's latest metrics, and define seven essential cumulative biomarkers for long-term health. 📝Summary In this episode, biological data scientists Rob and Stephan challenge the standard approach to sleep tracking validation, proposing that detecting deviations from an individual's baseline is often more valuable for the user than absolute agreement with polysomnography. The hosts shortly brainstorm the creation of an independent, crowd-funded wearable testing institute to provide unbiased data for the quantified self community and research. Then they analyze the utility of Oura’s new Sleep Debt and Cumulative Stress features, discussing how these metrics align with subjective experiences of recovery after social events like the Viennese ball season. The conversation expands into a deep dive on "cumulative biomarkers," where Stephan outlines a suite of stable, long-term health indicators, including HbA1c, VO2 max, Grip Strength, and the Omega-3 Index, that serve as superior proxies for longevity compared to transient measurements. ⏳Chapters 00:00:00 Sleep Study Analysis: User centric comparisons 00:10:39 Testing Philosophy: Why "more or less than usual" matters most 00:16:13 The Vision: A crowd-funded independent wearable testing lab 00:24:37 Oura's Trend Features: Analyzing Sleep Debt and recovery timelines 00:34:43 Cumulative Stress: Physiological stress vs “Distress” vs "Eustress" 00:41:51 Hardware Woes: The decline of Fitbit and device longevity 00:45:15 Feature Disparity: Oura Health Panels and US vs. EU regulations 00:51:22 Cumulative Biomarkers: Stable markers vs. transient snapshots 00:52:23 Metabolic Health: Why HbA1c trumps fasting glucose 00:57:55 Fitness Markers: VO2 Max and the utility of Grip Strength 01:01:31 Nutritional Status: The Omega-3 Index and cell membrane saturation 01:05:22 Organ Health: Cystatin C for kidney function and DXA for body composition 01:09:47 Cardiovascular Risk: The Coronary Artery Calcium (CAC) score 01:12:25 Smart Scales: Bio-impedance limitations and the need for handles 📚Resources In the episode we call the discussed biomarkers “integrative”, but “cumulative” better captures the intended meaning. Rob's sleep study Polysomnography  Cohen's Kappa (Statistic) Sensitivity and specificity  Oura's Sleep Debt Feature Oura's Cumulative Stress Feature Oura's Resilience Feature Oura's Daytime (Physiological) Stress feature Distress vs Eustress Electrodermal activity as proxy for stress FitBit Sense 2 (with cEDA sensor)  Oura's Health Panel feature Red blood cell Glycated hemoglobin (HbA1c)  HbA1c > 6.5% is used for diabetes diagnosis VO2 max  Grip strength as a mortality predictor Omega-3 Index (Dr. Rhonda Patrick) Cystatin C (Kidney Function) DXA Scan  Radiation comparison (DXA ~0.001mSv, US coast-to-coast round-trip flight ~0.03mSv) Coronary Artery Calcium (CAC) Score The limits of coronary calcium  Visceral Fat Preprint introducing "Peakspan" Nature Medicine paper "Shared and specific blood biomarkers for multimorbidity" 🎙️About Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise in the health and fitness industry. Learn more and subscribe on your favorite platforms: YouTube Spotify Apple Podcasts Amazon Music Collection of all show notes ⚠️Disclaimer: This podcast represents our own opinions and is for informational purposes only. It does not constitute medical or financial advice or a professional relationship.

    1h 18m
  7. The “Dark Side” of Tracking & VO2 Max as Longevity Predictor: Testing, Training & Our Results (Fit For Science Episode 9)

    FEB 2

    The “Dark Side” of Tracking & VO2 Max as Longevity Predictor: Testing, Training & Our Results (Fit For Science Episode 9)

    In this episode, Rob and Stephan explore the psychological risks of self-quantification, the science of aerobic capacity, and the physiological nuances of lactate thresholds. 📝Summary Biological data scientists Rob and Stephan discuss the "dark side" of the quantified self, specifically focusing on orthosomnia, a condition where sleep tracking leads to increased anxiety and worsened sleep quality. They reflect on the importance of using technology as a tool for a specific purpose rather than making the tracking itself the goal. The conversation transitions into a deep dive on VO2 max, explaining its critical role as a longevity predictor and the varying results obtained from different exercise modalities like cycling and running. Finally, the hosts break down the science of lactate thresholds, explaining how the body's metabolic shift from aerobic to anaerobic states serves as a vital biomarker for training optimization. ⏳Chapters 00:00:00 Introduction: The dark side of tracking and VO2 max 00:00:55 Orthosomnia: When sleep tracking causes insomnia 00:05:09 The psychological impact of metrics and obsession 00:13:13 Tracking with purpose: Avoiding the identity trap 00:25:59 Oura Ring experiences: “Injuries” and data accuracy 00:30:50 Strength training and basal metabolic rate 00:36:47 VO2 Max: The ultimate longevity marker? 00:38:26 Hazard Ratios: Comparing fitness to smoking 00:44:39 The U-shaped curve of exercise volume 00:49:37 Gold Standard: VO2 max lab testing protocols 01:04:25 Training for capacity: The Norwegian 4x4 protocol 01:07:51 Lactate thresholds and metabolic switching 01:16:09 Wearable estimations: Garmin vs. Apple vs. Oura 01:21:47 VO2 Max Records: Oskar Svendsen (97.5) and Tadej Pogačar (96) 01:23:42 Teaser: Biological age and integrative biomarkers 📚Resources Orthosomnia The Molecular Precision Medicine Master’s Programme at Medical University of Vienna (where Rob and Stephan teach) Quote for purposeful tracking: "I shall not waste my days in trying to prolong them" - Jack London Natural language processing (NLP) Semantic analysis Development of a scale for measuring orthosomnia: the Bergen Orthosomnia Scale (BOS) Sleep tracker use nears 50%, AASM survey finds Prevalence of Orthosomnia in a General Population Sample  Dark triad (Personality Traits) Basal metabolic rate (BMR) BMR Calculator  Lean body mass was found to be the single predictor of BMR Phelps supposedly consumed 8,000-10,000 kcal per training day before the Olympic Games VO2 max Hazard ratio How does VO2 max correlate with longevity? - Peter Attia  Physical activity types, variety, and mortality: results from two prospective cohort studies  Peak oxygen uptake was strongly correlated to total heart volume Rob's VO2 max results: 58 for cycling, 54 for running Stephan's VO2 max results: 42 for cycling, 49 for running VO2 max percentile calculator VO2 Max Chart Aerobic high-intensity intervals improve VO2max more than moderate training (Norwegian 4x4)  How to Improve Your Cardio Capacity (VO2 Max) Lactate threshold for aerobic to anaerobic switch at 2mmol/litre Lactate shuttle hypothesis  Maximum heart rate formula: 220 - age in years Cooper test for VO2max estimation Walking test for VO2max estimation 🎙️About Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise in the health and fitness industry. Learn more and subscribe on your favorite platforms: YouTube Spotify Apple Podcasts Amazon Music ⚠️Disclaimer: This podcast represents our own opinions and is for informational purposes only. It does not constitute medical or financial advice or a professional relationship.

    1h 25m
  8. AI is Changing Wearables in 2026(?) and Predicts 130 Diseases from Sleep! (Fit For Science Episode 8)

    JAN 26

    AI is Changing Wearables in 2026(?) and Predicts 130 Diseases from Sleep! (Fit For Science Episode 8)

    Rob and Stephan evaluate current AI features in wearables, break down a revolutionary paper predicting diseases from a single night of sleep, and discuss the future of medical integration into wearables. 📝Summary In this episode, biological data scientists Rob and Stephan critically assess the current use of AI in the wearable market, ranging from the practical limitations of Oura and Whoop coaches to the potential of Google’s Gemini and Withings’ biomarker-tracking devices. The central scientific discussion focuses on "SleepFM," a groundbreaking foundation model published in Nature Medicine that utilizes self-supervised learning on polysomnography data to predict over 130 diseases, biological age, and mortality risk from a single night of sleep with unprecedented accuracy. The hosts speculate on how this technology could bridge the gap between clinical sleep labs and consumer wearables, potentially transforming preventive medicine through longitudinal tracking and non-invasive sensors. ⏳Chapters 00:00:00 AI in wearables and their current capabilities 00:01:21 AI Coaches: Testing the limits of Oura, Whoop, and Garmin  00:12:24 The Smart Toilet: Withings U-Scan and the value of waste biomarkers  00:23:00 Environmental Health: PVC off-gassing and vinyl records  00:28:15 Generative AI: ChatGPT Health and Claude for Life Sciences  00:37:17 SleepFM: A multimodal sleep foundation model for disease prediction  00:43:00 Self-Supervised Learning: How foundation models learn from sleep data  00:51:00 Disease Prediction: Predicting 130 conditions with unseen accuracy 00:59:46 The Future: Translating clinical models to consumer wearables  01:19:25 Community Feedback 📚Resources Introducing Oura Advisor (not Coach) WHOOP Coach Powered by OpenAI Active Intelligence With Garmin Connect+ U-Scan Nutrio News: Withings latest smart scale (‘longevity station’) Withings Intelligence Body Scan Ketone bodies Ketosis: Definition, Benefits & Side Effects Keto Breath (“dragon breath”) Air Quality Measurement Device VINYL: Maybe it's time we had an intervention. Introducing ChatGPT Health Segment about AI in health(care) Claude in healthcare and the life sciences Clarification: Anthropic's product is called Claude with three differently sized models named Haiku, Sonnet, and Opus. ICD-10 and ICD-11 Codes: International Classification of Diseases (ICD) Understanding ICD-10 | Johns Hopkins Medicine Healthcare Spending - Our World in Data Federated learning Swarm Learning SleepFM - Nature Medicine paper Code Stanford Sleep Bench v1.0 Foundation model Attention Is All You Need (Transformers) Self-supervised learning ImageNet Fine-tuning Reinforcement learning from human feedback (RLHF) Polysomnography Recurrent neural network (LSTM) Long short-term memory (RNN) C-index: Evaluating Survival Models Best Wearables for Sleep: Scientific Rankings (2024-05) Best Wearables for Sleep: Scientific Rankings (2025-10) Philips Somnolyzer 24x7 for automated sleep staging Whoop listened(?) and is looking for a VP for Foundation AI AUROC of blood pressure to predict ASCVD ~0.80 Podcast Recommendation: Drug Story  Atorvastatin (Lipitor) Life expectancy: Netherlands (82.2) vs Austria (82.0) Diagnostic and Statistical Manual of Mental Illnesses (DSM-5) Mechanism does not imply outcome. Outcome implies mechanism. - Layne Norton No Biological Free Lunches 🎙️About Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise in the health and fitness industry. Learn more and subscribe on your favorite platforms: YouTube Spotify Apple Podcasts Amazon Music ⚠️Disclaimer: This podcast represents our own opinions and is for informational purposes only. It does not constitute medical or financial advice or a professional relationship.

    1h 25m
4.8
out of 5
4 Ratings

About

Two scientists discuss how they live their best life, using science, data, tech, wearables, and systems. Fit For Science is a deep-dive podcast hosted by two biological data scientists, Rob and Stephan, exploring the intersection of research, health tech, and data-driven lifestyle design. The hosts provide evidence-based systems, layered with practical "N=2" personal experimentation, to cut through the noise and enable everyone to become their best N-of-1. The Quantified Scientist (Rob): youtube.com/TheQuantifiedScientist Stephan's Website: http://polytechnist.me

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