Is VO2 Max "Overrated"? (& What To Focus On Instead), Old Man Olympics, Big Toe Health & More With Mark Sisson

Full Show Notes: https://bengreenfieldlife.com/sisson2026  In this episode with Mark Sisson, you'll discover why VO2 Max may be overrated as the gold standard for longevity, and why chasing it cost Mark 32 pounds of muscle and the real-world function that actually matters. You'll explore his "Old Man Olympics" framework: a decathlete's approach to fitness at 72, spanning strength, speed, balance, and endurance. You'll also get his take on cold plunging, alcohol, biohacking, AI, and find out why foot health may be the single most overlooked lever in your longevity toolkit, from bunions to glute activation to big toe function. Mark Sisson ignited the ancestral health movement with Mark's Daily Apple and The Primal Blueprint, popularized keto and intermittent fasting with The Keto Reset Diet and Two Meals a Day, and sold Primal Kitchen to Kraft Heinz for $200M. He now runs Peluva, a toe-separated shoe company built around restoring foot strength and healthy gait, and is the author of Born to Walk. 👉 Get 10% off Peluva shoes with code BGREENFIELD at bengreenfieldlife.com/peluva. Episode Sponsors: Just Thrive: The Just Thrive Gut Essentials Bundle pairs a probiotic clinically proven to arrive 100% alive in your gut with Digestive Bitters, a blend of 12 science-backed herbs. Visit justthrivehealth.com/BEN and save 20% with promo code BEN, or get a full refund if you don't notice a difference. Timeline: Give your cells new life with Mitopure, which unlocks a precise dose of Urolithin A and promotes healthy aging. Mitopure starts at $79 at timeline.com/BEN. TruDiagnostic: Advanced at-home epigenetic testing measuring over a million biomarkers. Visit TruDiagnostic.com and use code BEN20 for 20% off. ULTRA: A clean, nicotine-free, caffeine-free pouch delivering smooth, sustained energy using clinically backed nootropics and adaptogens. Visit takeultra.com and use code BENGREENFIELD for 15% off. BlockBlueLight: Flicker-free, ultra-low EMF, circadian-friendly BioLights with three modes to support natural rhythms and sleep quality. Get 10% off at blockbluelight.com/Ben (discount auto-applied at checkout). Qualia Stem Cell: Science-backed stem cell support taken just four days per month. Visit qualialife.com/boundless and use code BOUNDLESS for 15% off.See omnystudio.com/listener for privacy information.