56m
Vinod Khosla: “It’s Over for Human Doctors”
With Vinod Khosla
Vinod Khosla argues AI will replace human doctors, citing 88% AI vs 73% human accuracy in complex diagnosis and Limbic's 93% mental health diagnosis rate.
Iron Foundry Podcast
Conversations with founders, investors and athletes building the future of health
Investors
Founders
Featured episodes
Founder of Khosla Ventures
Vinod Khosla
Vinod Khosla argues AI will replace human doctors, citing 88% AI vs 73% human accuracy in complex diagnosis and Limbic's 93% mental health diagnosis rate.
Former Professional Cyclist, Investor and Podcaster
Lance Armstrong
In this podcast, Kyriakos the CEO of Terra interviews Lance Armstrong about his journey as a young athlete, cycling champion, and successful investor and podcaster.
Co-founder of Strava
Mark Gainey
Mark Gainey shares how Strava grew to 150 million users, starting with a niche market of middle-aged men in Lycra.
All episodes
We talk to the founders, executives, and investors who are redefining the business of fitness and wellness.
Filter
71 episodes
2026
8 episodes
Mo Elshenawy, CTO of Hims & Hers, discusses building AI into a telehealth platform with 2.6M subscribers and $2.3B in annual revenue.
George Hadjivarnava built Founding Foody to 90% of Cyprus online food orders, sold to Delivery Hero, and now leads engineering at Terra API.
Geoff Ralston discusses his journey from creating RocketMail to leading Y Combinator and founding SAFE, an AI fund.
David Lee shares insights from his 30-year journey in healthcare and tech, revealing how his battle with stage four lymphoma shaped his career.
If you Google it, most investors add no value and 70% of investors add negative value. I really, really believe that.
Vinod Khosla
Founder of Khosla Ventures · 21 August 2026 · 56m
Douglas Gremmen shares how HYROX sold 42,000 tickets in a day and expanded to 15,000 gyms worldwide.
1h 42m
CTO + Director of AI at Flo Health: Roman Bugaev + Vladislav Nedosekin
With Roman Bugaev and Vladislav Nedosekin
Roman Bugaev and Vladislav Nedosekin discuss scaling Flo Health to 80 million users and the AI innovations driving their growth.
Sacha Michaud shares how Glovo scaled to 25+ countries and a $2.3 billion acquisition, starting with a simple text button app.
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2025
14 episodes
1h 13m
Strava Cofounder: Mark Gainey
With Mark Gainey
Mark Gainey shares how Strava grew to 150 million users, starting with a niche market of middle-aged men in Lycra.
Tom Livesey, CTO of Thriva, discusses how the company scaled to deliver over 4 million tests and raised $11 million.
Dan Vahdat, CEO of Huma, discusses transforming healthcare with AI, impacting nearly 100 million lives, and engaging with global politicians.
David Turner, CTO of Virgin Active, shares insights on transforming the brand into a data-driven wellness leader and his role in the UK's COVID response.
Kian Sadeghi shares how Nucleus Genomics raised over $32 million and made a splash at a Jake Paul fight with a strategic hat placement.
Marcelo Lebre, co-founder of Remote, discusses scaling to 2,000 employees and the importance of health and longevity in leadership.
George Robson joined Sequoia at 25 and was featured in Forbes 30 Under 30. He shares insights on startup culture and investment strategies.
Dmitry Gurski scaled Flo Health to 76 million users and $200 million in revenue, raising $230 million from General Atlantic.
We actually don't like 50-50. We think it's a negative signal if you and your co-founder have 50-50 equity.
George Robson
Partner at Sequoia Capital · 5 June 2025 · 1h
Ethan Kurzweil, Managing Partner at Chemistry, discusses backing giants like Twitch and Twilio, and the unique openness of Silicon Valley.
Ivan Selin shares how AllTrails grew from 10 million to 75 million users in five years, aiming to become the 'Airbnb for the outdoors.'
Kian Sadeghi shares how Nucleus made a splash with a viral moment at a Jake Paul fight, boosting their SEO and brand visibility.
In the latest podcast, our product engineer Vanessa breaks down how to get inside your users' heads to build products that people love.
In this live podcast with Kyriakos the CEO of Terra, George Hadjigeorgiou shares his journey in building the world’s largest nutrition study.
In this live podcast with Kyriakos the CEO of Terra, Matt Robinson, founder of GoCardless, discusses the challenges and lessons from building a billion-dollar business.
2024
18 episodes
1h 1m
Cycling Legend, Investor, and Podcaster - Lance Armstrong
With Lance Armstrong
In this podcast, Kyriakos the CEO of Terra interviews Lance Armstrong about his journey as a young athlete, cycling champion, and successful investor and podcaster.
In this podcast with Kyriakos the CEO of Terra, Vadim Fedotov a former professional athlete turned entrepreneur, shares his journey in founding Bioniq.
In this podcast, Bryan Johnson shares his personal story of how he began his journey to becoming the the world's most measured human.
In this podcast with Kyriakos the CEO of Terra, Anttoni Aniebonam shares his journey founding Veri, and his decision in the acquisition by Oura to further his vision.
In this podcast with Kyriakos the CEO of Terra, Andrew Lacy shares his journey with Prenuvo which began from a personal health crisis.
In this podcast with Kyriakos the CEO of Terra, Amber Taylor shares her journey from childhood running to her leadership role at Nike and navigating cultural differences.
In this podcast with Kyriakos the CEO of Terra, Sean Harrington shares his journey from founding NoteMeal to becoming the VP of Teamworks.
In this podcast with Kyriakos the CEO of Terra, Mike Nemke shares insights on team dynamics and the founding story of Function Health
In this podcast with Kyriakos the CEO of Terra, John Anthony shares his journey through the development of an AI-based swim watch and other health-focused products.
In this podcast with Kyriakos the CEO of Terra, Lucia Huang, co-founder and CEO of Osmind, shares her journey in creating Osmind.
The food system is dirty, and after years of testing, I’m horrified by how toxic it is.
Bryan Johnson
Founder of Don't Die · 25 October 2024 · 59m
In this podcast, Doug Sweeny talks Oura Ring's features and potential in wearable tech with Terra CEO Kyriakos Eleftheriou.
In this episode, Kyriakos interviews Eswar, Equinox's CTO, who shares his journey from engineering to fitness technology.
In this podcast with Kyriakos the CEO of Terra, Dr. Andrew Brandeis shares his journey towards creating OK Capsule.
In this podcast, Kyriakos the CEO of Terra, talks about Instalab’s journey with Adora Cheung.
In this podcast, Kyriakos talks with Sokratis, the founder of Numan, a digital clinic for men. Sokratis discusses his journey of founding Numan.
In this podcast with Kyriakos, we explore the journey of Dave Wright, the founder of MyZone, from gym operator to pioneer in fitness technology.
An interview with greenTEG and CORE's founder, Wulf Glatz
In this podcast, Kris Gethin shares his journey first with bodybuilding.com, and into creating KAGED, the line that changed supplement industry by transparency.
Listen wherever you get your podcasts
2023
21 episodes
51m
Podcast with Eric Min, Co-founder of Zwift
With Eric Min
Podcast with Eric Min, Co-founder of Zwift In this podcast, we connected with Eric Min, Co-founder of Zwift. Below are some highlights of the conversation Listen on Spo
Melanie Strong shares insights from her journey at Nike and launching NEXT VENTŪRES with Lance Armstrong.
In this interview, Ulrich Schoberer, the founder of the power meter, delves into his journey from a medical engineer and cyclist to an innovator revolutionizing cycling.
In this podcast, we connected with Gil Blander, founder of Inside Tracker, a longevity company that creates evidence-based solutions that are simple, clear, and actionable.
51m
Co-founder of ZOE - George Hadjigeorgiou, on understanding how food affects your body
With George Hadjigeorgiou
In this podcast, we connected with George Hadjigeorgiou, co-founder of Zoe, the personalized nutrition program from the world's largest nutrition-science study.
O2X Human Performance, the Boston-based organization providing comprehensive science-backed programs to elite sports teams, federal agencies, and the military.
In this podcast, we connected with Phil Southerland, founder and CEO of Supersapiens, who is building the future of human performance through real-time glucose insights.
Virgílio Bento shares how Sword Health secured a $1.5M contract within months of launching in 2020.
In this podcast, we connected with Niko Bonatsos, managing director at the renowned venture capital firm General Catalyst and early investor in Terra.For the podcast:
In this podcast, we connected with Ray Maker, aka DC Rainmaker, discussing the story of one of the most well-known blogs and Youtube channels in the wearable and sensor
Founder and President of Levels: Josh Clemente In this podcast, we connected with Josh Clemente, Founder and President of Levels, one of the fastest-growing metabolic h
I went to the doctors and some of the best doctors in London. The one thing that they gave me was a leaflet from the Heart Foundation about nutrition.
George Hadjigeorgiou
Co-founder of ZOE · 13 November 2023 · 51m
Founder and CEO of Hydrow: Bruce Smith and the journey of changing Rowing In this podcast, we connected with Bruce Smith, founder and CEO of Hydrow. I was really excite
Alistair Brownlee: The Journey of the most successful triathlete In this podcast, we connected with Alistair Brownlee, one of the most successful triathletes in history
How Rapha is Inspiring the World to Live Life by Bike: Daniel Blumire In this podcast, we connected with Daniel Blumire, Co-Managing Director of Rapha - the UK-based cyc
46m
From Building Startups in Silicon Valley to Creating a Viral YouTube Channel — John Coogan
With John Coogan
The Soylent Co-Founder's Journey to Founders Fund: John Coogan In this podcast, we connected with John Coogan, Co-founder of Soylent and Lucy, who is building a viral Y
Podcast with Ryan DeLuca, Founder of BodyBuilding.com and Black Box VR In this podcast, we connected with Ryan DeLuca, Co-founder of BodyBuilding.com and Black Box VR.
Podcast with Anthony Vennare, Co-founder of Fitt Insider In this podcast, we connected with Anthony Vennare, Co-founder of Fitt Insider. Below are some highlights of th
Podcast with Robin Thurston, CEO of Outside In this podcast, we connected with Robin Thurston, founder of MapMyFitness, former Chief Digital Officer of Under Armour, and
Podcast with Mark Gainey, Co-founder of Strava In this podcast, we connected with Mark Gainey, Co-founder and Chairman of Strava. Below are some highlights of the conve
Roger Schmitz discusses Moxy's muscle oxygen sensor, which launched in 2013 and is now used in heart failure research.
36m
Genopets co-founder: How blockchain and gaming intersect, a conversation with Co-Founder Jay
With Jay Chang
Jay, co-founder of Genopets, explains how a health-data NFT idea from EOS evolved into a move-to-earn game with 3,219 Genesis pets.
2022
10 episodes
1h
Founders of Ultrahuman: Vatsal Singhal, Mohit Kumar
With Vatsal Singhal and Mohit Kumar
Vatsal Singhal and Mohit Kumar discuss scaling Ultrahuman and their previous venture, Roadrunner, which employed over half a million people.
Ivan Vatchkov of Kalibra.ai discusses transforming health data into actionable insights, emphasizing personalized health journeys and rapid prototyping.
59m
Co-founders of Breakaway: Jordan Kobert and Christian Vande Velde
With Jordan Kobert and Christian Vande Velde
Jordan Kobert and Christian Vande Velde discuss Breakaway's journey from Y Combinator to revolutionizing cycling data analysis.
Anthony Diaz shares how Health Hero aims to help a billion people get healthy through gamification and NFTs.
Cyndi Williams, CEO of Quin, discusses personalized diabetes management and achieving high user engagement in the UK and US.
Ellis McCue discusses Territory Foods' strategic growth from DC to the West Coast and her personal journey into health-focused entrepreneurship.
When you hear people say, oh, you should sleep at 68 degrees Fahrenheit, that's bullshit.
Matteo Franceschetti
Co-founder and CEO of Eight Sleep · 15 February 2022 · 55m
Kieran Gibbs shares insights on playing for Arsenal, the tech boom in Miami, and his investment journey with Terra.
David Lee shares insights on investing in founders over ideas and the evolving tech landscape from Silicon Valley to global hubs.
Matteo Franceschetti discusses Eight Sleep's $170M funding and how Miami's tech scene is evolving.
Lance Armstrong discusses his early career, the evolution of cycling technology, and the pivotal role of power meters in training.
Frequently Asked Questions
- What is Iron Foundry?
- Iron Foundry is the podcast from Terra API. Kyriakos Eleftheriou, Terra's founder and CEO, talks with the founders, investors, operators and athletes building the future of health and fitness about how they built what they built.
- Where can I listen to the podcast?
- Every episode is on Spotify, Apple Podcasts and YouTube, and the RSS feed works with any podcast app. Each episode page on this site also has the player, so you can listen here without leaving.
- How often are episodes released?
- New conversations go out every few weeks. Follow the show in your podcast app, or leave your email in the sign-up box on this page and you will get one message when an episode goes live.
- Can I watch the episodes as video?
- Yes. Episodes are filmed and published on YouTube, and the episode pages here embed the video where one exists.
- Are there transcripts?
- Yes. Most episode pages carry a speaker-labelled transcript and a short list of key takeaways, so you can skim a conversation before you press play.
- Who is the podcast for?
- Anyone building or investing in health and fitness: founders, product and engineering leads, investors, and athletes turning their experience into companies. The conversations focus on how the business was actually built.
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