Tim FerrissDr. Peter Attia, MD — Fasting, Metformin, Athletic Performance, and More | The Tim Ferriss Show
CHAPTERS
- 5:37 – 10:08
Show kickoff + the “Five Things” format with Peter Attia
Tim Ferriss welcomes Dr. Peter Attia back and sets up a new episode structure: rotating through things Peter is excited about, has changed his mind on, and still does that’s absurd or stupid. Peter agrees to cycle through categories instead of doing them in blocks.
- •Tim frames Peter as his go-to resource for longevity and healthspan
- •They introduce the episode format: excited about vs. changed mind vs. absurd habits
- •Peter gives a quick bio including his podcast, The Drive
- 10:08 – 18:12
“Centenarian Olympics”: training for physical ability in your 90s and beyond
Peter explains his “Centenarian Olympics” idea: defining the practical physical tasks he wants to be able to do late in life and training with specificity toward them. He traces the concept to insights from a funeral, where he realized many people lose physical function long before death.
- •The idea arose after noticing a person’s last decade was limited by injuries even before Alzheimer’s decline
- •Peter argues many people experience “physical/exoskeleton death” before death on paper
- •He proposes individual, personalized events that reflect what you want to do at 90–100
- •He lists examples like getting up off the floor, handling a running toddler, stairs with groceries, and lifting luggage overhead
- 18:12 – 27:27
Reverse-engineering training: goblet squats, deadlifts, and trunk stability mechanics
Tim asks how to “back out” from a goal like a 30-pound goblet squat at age 90 to training targets earlier in life. Peter focuses less on the exact math and more on biomechanics—learning movement patterns safely now so the ability persists later.
- •Peter describes goblet squats and why they represent real-world movement (scapular protraction while holding load)
- •He emphasizes technique and spinal mechanics, including generating intra-abdominal pressure to stabilize the spine
- •Peter treats deadlifts and squats as “audits” that reveal good vs. bad days and movement quality
- •He describes restarting deadlift training from very light weight to fix movement defects (including straight bar vs. hex bar)
- 27:27 – 37:54
Changed mind on metformin: longevity hopes vs. mitochondrial performance tradeoffs
Peter explains that he used to be bullish on metformin as a low-risk longevity and cancer-mitigating agent, even for healthy people. After focusing on zone two training and observing performance changes, he became convinced metformin impaired mitochondrial output for him and reevaluated its role in very healthy, highly active individuals.
- •Peter describes metformin as a mild mitochondrial toxin that affects complex one and activates AMP kinase
- •He explains zone two training as pushing work capacity while keeping lactate below a threshold to improve mitochondrial efficiency
- •He observed reduced zone two output when metformin was in his system and found the effect unambiguous for him
- •He notes later studies suggesting metformin may impair muscle adaptation/growth signals
- •He concludes exercise focus likely beats metformin for him, while acknowledging uncertainty about patient cutoffs and cycling strategies
- 37:54 – 42:29
Absurd habit: egg boxing (and the legendary champion egg)
Peter shares “egg boxing,” a long-running game where eggs compete by being tapped together, with the uncracked egg advancing. Tim and Peter recount the obsession level, including a famously dominant egg and even custom championship belts.
- •Rules: eggs “fight,” cracked egg loses, surviving egg accumulates wins across eggs made that day
- •Peter tracks winners and treats it as a serious ongoing tradition
- •They recount the unusually dominant egg nicknamed “Ramanujan”
- •Peter describes an idea to sneak the egg into imaging to see what made it special
- •Nick Stenson built championship belts for eggs as part of the tradition
- 42:29 – 54:10
Excited about fasting—but frustrated by the lack of dosing science
Peter describes fasting as a powerful tool but argues the field lacks clear guidance on how to “dose” fasting regimens. He outlines an idea to fund animal studies philanthropically because traditional funding sources and human trials are impractical.
- •Peter fasts about seven days per quarter and says people reasonably ask why that dose
- •He argues mortality outcomes would take too long to study in humans
- •He proposes philanthropic funding for an animal model study comparing fasting regimens
- •He sketches possible study arms and outcomes: lifespan plus biomarker tracking (metabolomics/proteomics, autophagy-related signals, inflammation)
- •He explains his current routine: a week of keto, then a week water-only fasting, then another week of keto; he uses electrolytes like sodium and magnesium
- 54:10 – 1:00:57
Changed mind: personality isn’t fixed (Peter’s anger “half-life”)
Peter says he used to believe personality was essentially hardwired and unchangeable, especially his anger. He now believes personality traits and coping patterns can shift substantially with work, and he describes tracking progress as a “fury half-life.”
- •Peter describes a long-held belief that he was inherently angry and “not meant to be around other people”
- •He reframes personality traits as not deterministic—more like risk factors than certainties
- •Tim adds the framing of certain traits as once-protective coping mechanisms
- •Peter references Terrence Real’s metaphor of moving the “adaptive child” to the back seat
- •Peter expresses optimism that continued work could reduce anger further over time
- 1:00:57 – 1:07:51
Absurd habit: tearing phone books (technique, obsession, and unintended consequences)
Peter tells the story of learning to tear phone books in college and turning it into a compulsive habit. It became so central that he even considered phone book size as a factor when evaluating where to attend medical school.
- •A friend demonstrated phone-book tearing is mostly technique and grip strength
- •Peter collected stacks of phone books from a mall store and practiced until his hands bled
- •He tore phone books in phone booths, leaving torn books behind as he biked to class
- •He kept a spreadsheet for medical school decisions that included phone book size in the city
- •He recounts tearing multiple phone books on the first date with his future wife despite her objections
- 1:07:51 – 1:21:13
Excited about archery, hunting, and eating wild game (plus gear deep dive)
Peter credits Tim’s influence for getting him into archery, which escalated into an everyday practice and hunting lifestyle. He describes archery as both a performance practice and a tool for emotional regulation, then gets into specific bow and release choices and the importance of surprise release via back tension.
- •Peter describes daily practice routines (paper target scoring and 3D target shooting)
- •He recounts a rage moment snapping arrows after missing, and how archery forces emotional control
- •He describes hunting as population control plus harvesting and feeding his family, changing how he relates to food
- •He aspires to eat only food he has killed within a year timeframe he mentions
- •He details equipment: a Hoyt RX-3 bow and John Dudley releases (Silverback and Nock2It), and explains back tension and surprise release mechanics
- 1:21:13 – 1:27:45
Changed mind: childhood experiences can shape adults more than we admit
Peter says he used to downplay childhood trauma or assume it could be net positive without much downside. He now believes perceived helplessness in childhood can shape personality and later behavior, and he ties this to how children interpret adult anger.
- •Peter emphasizes that what matters is how a child perceives helplessness, even if adults later minimize it
- •He gives examples of how losing a parent (suddenly or not) can inject chaos and shape a person
- •He recounts an incident where he went “ballistic” in traffic and realized it could impact his daughter even if not directed at her
- •He argues children can be affected by “shrapnel” from adult emotional outbursts
- •He connects the insight to being more attentive to emotional health in his patients and in family life
- 1:27:45 – 1:42:30
Therapy and tools for anger: meditation, vocabulary, and accountability
Tim asks what helped Peter reduce anger and revise his belief that it was immutable. Peter lists multiple contributors—meditation creating a gap between stimulus and response, therapy expanding emotional vocabulary beyond “pissed off,” and direct, sometimes blunt feedback from therapists.
- •Peter says vipassana-style meditation helped create a pause between stimulus and reaction
- •He describes learning to label underlying emotions (hurt, sadness, helplessness) instead of defaulting to anger
- •He recounts a chicken being killed and realizing his rage was tied to feeling inadequate and missing a chance to console his daughter
- •He mentions listening repeatedly to David Foster Wallace’s “This Is Water” and references Ryan Holiday’s work on anger
- •Peter explains what he values in therapists: insight that changes perspective, measurable reduction in suffering, and willingness to tell him when he’s wrong
- 1:42:30 – 1:51:03
Absurd habit: “Forks and Knives” (plus a detour into xenon and drug rules)
Peter describes a lifelong counting game while unloading the dishwasher, rooting for “spoons” as the underdog. The conversation then detours into xenon gas as a performance enhancer Peter once tried to source, difficulties of anti-doping, and what substances are or aren’t banned.
- •Peter describes the dishwasher counting game and how “spoons” can get handicaps via utensil proxies
- •He jokes about resisting rule changes like counting cups as spoons to preserve the game’s integrity
- •Tim asks about xenon gas; Peter explains he tried to source it but couldn’t obtain a practical supply
- •Peter discusses testing difficulty for growth hormone compared to testosterone signatures
- •They note psilocybin isn’t banned by WADA while MDMA is, and Peter comments on the irony
- 1:51:03 – 1:55:56
Excited about race car driving as an “audit” (and what it teaches)
Peter explains his growing focus on learning to drive race cars, including simulator and track work. Like archery, he treats it as an emotional and performance audit—mistakes compound quickly, and anger or over-squeezing makes performance worse.
- •Peter describes race driving as a craft that rewards calm, not aggression
- •He credits his coach for spotting earlier mistakes that lead to later failures
- •He highlights the need to acknowledge errors without spiraling into self-torture
- •Tim references the documentary “Senna” while Peter reflects on how dangerous racing used to be
- •Tim asks whether Peter should pick more group-oriented hobbies; Peter notes his tendency toward solitary pursuits
- 1:55:56 – 2:10:36
Changed mind: exercise benefits are bigger than he realized + sleep protocols and alcohol tradeoffs
Peter says he underestimated just how broad and powerful exercise benefits are, including for brain health, and cites prior internal research work pointing to exercise as a top lever for Alzheimer’s risk reduction. The conversation shifts to sleep behaviors Peter prioritizes and how alcohol reliably degrades his sleep metrics.
- •Peter says exercise emerged as the top tool in a deep review of Alzheimer’s-related interventions his team conducted
- •He describes a “portfolio approach” to training: stability, strength, aerobic, and anaerobic work (tied back to the Centenarian Olympics)
- •He outlines sleep practices: light management, consistency, darkness, an eye mask, and a bed-cooling system (including an upgrade to Ooler)
- •He mentions using Felix Gray glasses and describes avoiding evening “activation” from email/social media
- •Peter explains alcohol effects he sees: reduced REM, slightly reduced deep sleep, more fragmentation, higher resting heart rate, lower HRV, and higher body temperature; he says he drinks far less than before
- 2:10:36 – 2:47:10
Absurd habit: the “What if?” game + excited about podcasting and interviewing craft
Peter shares an ongoing “What if you were the same person, but…” game he plays with his wife using intentionally ridiculous hypotheticals. He then returns to something he’s excited about: podcasting, learning interviewing craft, and the value (and pain) of reviewing his own episodes to improve.
- •Peter explains the structure of the “What if?” game and gives examples involving toenail vegetable chopping, wearing a red Speedo, and other scenarios
- •Tim shares a story about how nervous tics become obvious when you listen back to recordings
- •Peter says he enjoys asking questions more than being asked, and listens to interviews for both content and technique
- •They discuss preparation styles, including Peter’s approach of deep content prep without fixed question lists
- •They close with where to find Peter’s work (The Drive, his site/socials), his “Studying Studies” series, and his newsletter
