Fit For Science

Stephan Reichl and Rob ter Horst
  • 4.8 (4)
  • Health & Fitness
  • Updated Weekly

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. Jul 16

    #21 The Rise of Screenless Wearables in 2026 + Fitbit Air vs Oura & Whoop

    Rob and Stephan dissect the rise of minimalist, screen-free health trackers, reviewing the popular Google Fitbit Air against established giants like the Oura Ring and WHOOP. 📝Summary In this episode, biological data scientists Rob and Stephan explore the growing market of screenless wearables, boosted by the recent launch of the Google Fitbit Air and massive investments in companies like Oura and WHOOP. They define the specific characteristics of these minimalist trackers, emphasizing their passive 24/7 tracking, long battery life, and deliberate lack of attention-grabbing notifications. Stephan shares his initial hands-on review of the Fitbit Air after being an Oura user for eight years, highlighting its impressive AI-powered food logging, integrated workout builder, and smart alarms, while critiquing its lack of custom journaling and granular daytime heart rate variability data. The hosts also discuss the inherent form-factor limitations of smart rings during exercise, analyze the dubious claims surrounding the drop-shipped Hume band, and examine how tech giants like Google are using these affordable devices to become ecosystem leaders. Finally, they offer practical tips on syncing multiple wearables via Apple Health without data conflicts.  ⏳Chapters 00:00:00 Screenless Wearables: The market shift towards minimalist trackers and the new Fitbit Air 00:01:21 Early Adopter: Why Stephan bought the Fitbit Air after 8 years with Oura  00:11:03 Defining the Category: What makes a wearable truly "screenless" 00:18:57 The Wearable Landscape: Amazfit Helio strap, Polar Loop, and smart rings  00:22:03 The Hume Band Scam: Drop-shipping, AliExpress clones, and fake scientists 00:26:23 Form Factor Limits: Why smart rings struggle with cycling and weightlifting 00:28:50 Divergent Data: Comparing wildly different readiness scores between Oura and Fitbit 00:34:05 Subscription Models: Device costs and the necessity of paid app memberships 00:50:42 Fitbit Air Review (Likes): AI nutrition logging, workout builders, and smart alarms 00:57:48 Fitbit Air Review (Dislikes): Missing custom tags, daytime HRV, and slow activity detection 01:05:30 Data Management: How to safely sync Fitbit Air with Apple Health 01:11:18 Final Verdict: Will Stephan ditch the Oura Ring for the Fitbit Air? 📚Resources  The New Google Fitbit Air and Other Fitness Bands Are Losing Screens—and Gaining Fans - WSJ Google Fitbit Air Sharing upcoming roadmap and improvements - Google Health Oura Ring 5 WHOOP  Correction: The first Whoop band officially became available and started shipping to elite athletes and professional sports teams already in 2015. Same year as the first generation Oura ring, which was sold as an end consumer product. It looks like Garmin is finally preparing its Google Fitbit Air-style screenless band, the Cirqa, for launch — but I hope it doesn't copy Google's approach to revamping its fitness app | TechRadar  Helio Strap  Zepp App  Amazfit Helio Strap does not require a subscription, but there is an optional premium add-on called Zepp Aura, a personalised Rest and Wellness Service. Ultrahuman Polar Loop Hume Band2.0  Explore Galaxy Ring Correction: Google Health loads for most, but not all, relevant Apple Health entries the last three months. …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.

    #21 The Rise of Screenless Wearables in 2026 + Fitbit Air vs Oura & Whoop

  2. Jul 1

    #20 Google Wants Your Fitbit Data for AI! And it’s not (all) bad news!

    Rob and Stephan dissect Google’s groundbreaking "Sensor FM" paper, exploring how a foundation model, trained on trillions of wearable data minutes, could revolutionize preventive healthcare and disease prediction. 📝Summary In this episode, biological data scientists Rob and Stephan break down Google's latest research introducing Sensor FM, a massive foundation model trained on over one trillion minutes of multimodal wearable data across 5 million users. They explore the technical mechanics under the hood, including its encoder-decoder architecture, its alignment with deep learning scaling laws, and a unique "AI classroom" setup where collaborating virtual agents optimize 35 distinct clinical health prediction tasks. The hosts discuss the profound implications of using generative AI like Gemini to transform these raw sensor representations into clinician-approved lifestyle recommendations, while critically evaluating the delicate trade-offs between continuous behavioral nudging, hidden human blind spots, and systemic data privacy risks. Finally, Stephan shares his upcoming personal testing protocol for the new Fitbit Air as a potential alternative to his long-term Oura ring setup. ⏳Chapters 00:00:00 Wearable Data Predictions: Google’s motivation for tracking disease and lifestyle indicators  00:01:48 Google Health Platform: The strategic endgame of consolidating consumer health tracking  00:04:00 The Interface Layer: Transforming raw hardware signals into actionable health insights  00:07:13 Introducing Sensor FM: A deep learning foundation model for wearable health data  00:10:15 Overcoming Data Labels: High phenotypic diversity and few-shot learning  00:12:37 Data Privacy vs. Preventive Care: Evaluating the societal trade-offs of deep tracking  00:17:18 Encoder-Decoder Architecture: The science of signal compression and reconstruction  00:18:43 Trillion-Minute Dataset: Mapping 5 million global wearable users 00:22:27 Empirical Scaling Laws: Maximizing compute and parameters for improved performance 00:27:19 The AI Classroom Experiment: Peer collaboration mechanisms among virtual agents  00:39:07 Gemini Judged by Clinicians: Blind evaluation of AI-generated health recommendations  00:44:57 Behavioral Nudging and Alignment: Addressing the blind spots of metric-driven optimization  00:50:42 Insurance Risk Paradigms: The dangers of continuous data history in for-profit healthcare  00:53:26 Fitbit Air vs. Oura Ring: Stephan’s upcoming personal logging experiment 📚Resources SensorFM from Google SenseFM: Towards a General Intelligence and Interface for Wearable Health Data  Google Fitbit Air, das Fitness - Tracker-Armband  Google Health  Foundation model Embedding (machine learning)  Generative AI  Supervised learning Few-shot learning Wearables with hypertension features: Huawei D2, Apple Watch, Whoop, Oura Nudging Dimensionality reduction Prince Charles’ “middle finger” dimensionality reduction example Sam Altman tweet: “there is no wall” Correction: The Netherlands is divided into 12 provinces and 3 special overseas municipalities "Life can only be understood backwards; but it must be lived forwards." - Søren Kierkegaard …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.

    #20 Google Wants Your Fitbit Data for AI! And it’s not (all) bad news!

  3. Jun 10

    #19 The Harmful “Longevity Bubble” + Updates from Oura, WHOOP, and Google's New FitBit Air

    In this episode, biological data scientists Rob and Stephan examine Oura's cardiovascular age validation study, discuss WHOOP's new medical concierge service, critically analyze the overhyped commercialization of the longevity bubble, and explore the citizen science potential of the Google Fitbit Air. 📝Summary In this episode, biological data scientists Rob and Stephan break down recent structural shifts in the consumer health-tech industry, critically analyzing the transparency and financial conflicts of interest within a newly published Oura validation study on cardiovascular age tracking. They critique WHOOP’s new opt-in medical concierge service, highlighting that well-informed users can often interpret their own baseline metrics more effectively. Transitioning into the commercial "longevity bubble," the hosts dismantle overhyped, unproven, and highly expensive products, such as bespoke blood panels and premium health clubs, by explaining that 80% of longevity gains stem from free or cheap, evidence-based fundamentals like consistent sleep, regular activity, a balanced diet, and resistance training. Finally, they evaluate the hardware and subscription-free utility of the new screen-free Google Fitbit Air, exploring its practical applications as a robust tool to capture population-level sleep and activity patterns across diverse demographics within the large-scale Vienna Prevention Project (ViPP). ⏳Chapters 00:00:00 Wearable Updates: Oura, Whoop, and the Google Fitbit Air 00:01:03 Cardiovascular Age: Oura's validation study and conflict of interest concerns 00:06:57 Medical Consultations: Evaluating Whoop's physician integration 00:13:01 The Longevity Bubble: Why extreme spending yields diminishing returns compared to basic health habits 00:19:34 Bryan Johnson's Blueprint: Analyzing the $1 million protocols versus free lifestyle fundamentals 00:27:01 Communicating Science: Why Dr. Mike effectively cuts through health influencer noise 00:30:06 Google Fitbit Air: Discussing the new screen-free, subscription-free tracker 00:35:55 Sleep Inertia: The psychological and physiological benefits of timed wake-ups 00:40:43 The Vienna Prevention Project (ViPP): Deploying wearables to 20,000 citizens for public health 00:48:42 Wearable Accuracy vs App Experience: Finding the Goldilocks zone for tracking devices 📚Resources Pulse wave velocity (PWV) New NUS Research Validates Oura’s Vascular Age Estimation, a Key Indicator of Cardiovascular Health - The Pulse Blog  Vascular age estimation using a consumer wearable sleep tracker | PLOS Digital Health WHOOP just hired doctors. - LinkedIn post  VIP medicine Bryan Johnson  Methylation clocks and epigenetic aging [...] the variation from test to test is so high that any given result is essentially statistically meaningless.[...] - Matt Kaeberlein on LinkedIn The Truth About Biological Age Tests  Dunedin Pace | Rejuvenation Olympics  Bryan Johnson's $1M 42 point longevity protocol and Stephan's comment   Doctor Mike: Evidence-Based Medical Communicator on YouTube  Google Fitbit Air, Fitness Activity Tracker Band  Rob's videos on Google's FitBit Air (so far) Fitbit Air: The $99 Future of Fitbit (WHOOP alternative)  The Fitbit Air Found WHOOP’s Weak Spot!  Fitbit: Scientific Sleep Test!  …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.

    #19 The Harmful “Longevity Bubble” + Updates from Oura, WHOOP, and Google's New FitBit Air

  4. Jun 3

    #18 Will AI Actually Cure All Diseases? The Promise, Limits & Our Contributions to “AI for Science”

    Stephan and Rob explore the ambitious claims made by AI industry leaders about rapid scientific advancement due to AI. They provide an introduction to the "AI for Science" field and analyze the fundamental physical limitations that govern the acceleration of biomedical discovery through AI. 📝Summary Biological data scientists Stephan and Rob evaluate the grand claims made by major tech executives regarding artificial (general) intelligence compressing a century of scientific breakthroughs into a single decade. By analyzing a recent paper co-authored by Stephan, the hosts break down the theoretical limits of general-purpose AI systems when faced with physical world restrictions. They emphasize that while cognitive tasks like literature synthesis, data analysis, and manuscript preparation can be massively accelerated, the time constants of the physical world remain irreducible bottlenecks. The conversation balances the promise of AI for science, including the hosts contributions to and beliefs in the field, with realistic infrastructure and policy demands, and the psychological and technical risks of relying on systems we do not fully comprehend. ⏳Chapters 00:00:00 Machines of Loving Grace: Dario Amodei and compressing a century of progress into a decade 00:04:10 Theoretical Scaffolding: Defining general purpose AI versus narrow machine learning systems 00:06:20 Cognitive vs Physical Domains: Splitting the lifecycle of a scientific research project & irreducible bottlenecks 00:15:35 Human Creativity and Technical Debt: The risk of losing comprehension via vibe engineering 00:19:01 Strategic Proxies: Using predictive biomarkers to capture outcomes early and bypass constraints 00:25:48 Emergence of “AI Co-Scientists”: Discovery of digital biomarkers from wearable datasets 00:38:15 Discovery Deficits: Why modern molecular biology is data-rich but discovery-poor 00:39:23 AI for Science: FutureHouse, Marinka Zitnik's ToolUniverse and James Zou's virtual lab 00:43:54 Simulating biomedicine with AI: What we did with early access to GPT-4 in 2023 00:49:57 Matthias Samwald, the EU General-Purpose AI Code of Practice and Accelerate Europe: Balancing trustworthiness and acceleration 00:54:55 MrBiomics: Automating biomedical data analysis using workflows and AI 00:58:44 Summary: Accelerating scientific discovery is possible, but not easy 📚Resources ⁠Stephan's recent paper: What are the limits to biomedical research acceleration through general-purpose AI?⁠ Social meda: ⁠LinkedIn⁠, ⁠X⁠, ⁠Press release: Potential and limitations of AI in biomedical research⁠  ⁠A multimodal sleep foundation model for disease prediction⁠ -> we discussed this paper before in episode 8: ⁠AI is Changing Wearables in 2026(?) and Predicts 130 Diseases from Sleep! (Episode 8)⁠  ⁠Rob's and Stephan's 2023 AI paper: GPT-4 as a biomedical simulator⁠ ⁠Press release: "ChatGPT" for biomedical simulations⁠ Correction: GPT-4 predates o1-preview by 1 year and 6 months, not 6 months ⁠Matthias Samwald⁠  Previously: Co-chair of the Safety & Security chapter of the ⁠EU's General-Purpose AI Code of Practice⁠  Now: ⁠Accelerate Europe⁠ coordinator Stephan's passion project: ⁠MrBiomics: Composable modules and recipes automate bioinformatics for multi-omics analyses⁠ …There is MUCH 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.

    #18 Will AI Actually Cure All Diseases? The Promise, Limits & Our Contributions to “AI for Science”

  5. May 18

    #17 The Three Dimensions of Wearables: Hardware, Algorithms and Apps (UI/UX)

    Rob and Stephan break down the three critical dimensions of wearables—hardware, algorithms, and UI/UX—to explain what truly drives accurate health and sports tracking. 📝Summary Biological data scientists Rob and Stephan explore the three foundational pillars that determine the quality of health and sports tracking wearables: hardware, algorithms, and Apps (UI/UX). They begin by evaluating the maturity of physical sensors like PPG and accelerometers, noting that while hardware capabilities have largely plateaued in high-end devices, energy density and battery technology continue to improve. The conversation then shifts to the critical differentiating factor of algorithms, breaking them down into three levels of complexity: direct on-device processing of heart rate, second-order computations for metrics like sleep staging, and highly advanced long-term disease risk predictions. Finally, the hosts discuss how the user interface and user experience tie these elements together, highlighting the importance of data presentation and the emergence of pure data aggregators in the wearable market. ⏳Chapters 00:00:00 The Three Dimensions of Wearable Performance 00:02:26 Hardware: The Foundation of Wearable Sensors 00:06:15 Understanding Raw Signals and Sensor Interference 00:09:46 Battery Technology and Hardware Durability 00:15:41 Level 1 Algorithms: Direct On-Device Processing (e.g., Heart rate) 00:23:51 Level 2 Algorithms: Derived Metrics (e.g., Sleep Stages) 00:55:50 Level 3 Algorithms: High-Level Aggregations (e.g., Long-Term Disease Risk) 00:56:20 Apps (UI & UX): The Final Wearable App Experience 📚Resources Photoplethysmogram (PPG) Accelerometer Global Positioning System (GPS) Pulse oximetry (SpO2 Sensor) Holter monitor (ECG) Polysomnography (Sleep Study) Heart rate variability (HRV) Dual carbon battery  Edge computing  Embedded system Pulse wave velocity (PWV) Foundation model (AI) User experience (UI/UX) Garmin Oura Health Apple Watch The accuracy of Apple Watch measurements: a living systematic review and meta-analysis Whoop Bevel  Athlytic  Garbage in, garbage out (GIGO) Introducing the new Google Fitbit Air  A Systematic Review of Chest-Worn Sensors in Cardiac Assessment: Technologies, Advantages, and Limitations  …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.

    #17 The Three Dimensions of Wearables: Hardware, Algorithms and Apps (UI/UX)

  6. May 9

    The 1-Minute Exercise Myth, Exercise & Mortality, Athletes' Health Risks & Rob's 8-Watch Marathon (Fit For Science #16)

    In this episode of Fit For Science, Rob and Stephan explore the complex relationship between various exercise types, intensity levels, and mortality, while also recounting Rob's intense DIY smartwatch-testing marathon. 📝Summary In this episode, Rob and Stephan dive into the nuanced impacts of physical activity on mortality and disease risk, emphasizing that while exercise is universally beneficial, its effects vary by type, intensity, and duration. The hosts unpack a 30-year cohort study involving over 111,000 participants, highlighting that 20 MET hours per week and a variety of activities optimally reduce mortality risk, with walking being highly effective. They critically examine recent wearable-based studies claiming that a few minutes of vigorous intermittent lifestyle physical activity (VILPA) can drastically substitute for longer low-intensity sessions, pointing out the limitations of substitution modeling. Furthermore, the discussion touches on "masters athletes," exploring how extreme, long-term exercise volumes can lead to unique cardiovascular adaptations and potential risks like atrial fibrillation or bradyarrhythmias, underscoring the need for specialized cardiological care. Finally, Rob shares his experience running a solo marathon fueled by a stationary bike feed station to test the GPS accuracy of eight different smartwatches simultaneously. ⏳Chapters 00:00:00 The DIY Marathon: Rob recounts his solo marathon to test eight smartwatches 00:13:48 Exercise and Mortality: A 30-year study on MET hours, activity types, and death risk 00:23:38 Walking vs. Swimming: Different mortality correlations between specific sports 00:28:46 The Power of Variety: How mixing exercise types significantly lowers mortality risk 00:32:49 VILPA and Vigorous Exercise: Analyzing studies on high intensity exercise 00:38:17 Critiquing claims that one minute of vigorous activity equals 54 minutes of low intensity activity 00:44:49 Masters Athletes: Defining high-performing athletes over 35 and their cardiovascular health 00:51:56 The Athlete's Heart: Exploring cardiovascular specific risks in endurance athletes 01:00:49 Final takeaways on balancing exercise intensity and seeking appropriate medical advice 📚Resources Physical activity types, variety, and mortality: results from two prospective cohort studies  Mix of different types of physical activity may be best for longer life  Metabolic equivalent of task (MET)  Association of wearable device-measured vigorous intermittent lifestyle physical activity (VILPA) with mortality  Wearable device-based health equivalence of different physical activity intensities against mortality, cardiometabolic disease, and cancer  Why Vigorous Exercise Is 4–10x More Effective Than Moderate (New Evidence)  The Best Type of Exercise for Longevity 1 Minute of Vigorous Activity Same as 53 Minutes of Light Intensity? Masters Athletes With Abnormal Cardiovascular Findings  The Recreational Athlete's Heart  Bradycardia  …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.

    The 1-Minute Exercise Myth, Exercise & Mortality, Athletes' Health Risks & Rob's 8-Watch Marathon (Fit For Science #16)

  7. 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.

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

  8. 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.

    The Silicon Valley Peptide Craze: Trust the Science, Not the Influencer (+ Hierarchy of Evidence) (Fit For Science Episode 14)
See All (21)

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

Information

  • Creator
    Stephan Reichl and Rob ter Horst
  • Years Active
    2025 - 2026
  • Episodes
    21
  • Rating
    Clean
  • Copyright
    © Stephan Reichl and Rob ter Horst
  • Show Website
    Fit For Science

You Might Also Like