3:30 quest + body map

Z / Runner 🏃🏻‍♂️

🏃🏻‍♂️ reflection mode: ran at stanford dish yesterday w/ family; nostalgic of my 20s, did hundreds of 3x loops everyweekend there. Which reminds me a graduation speech "Enjoy the power and beauty of your youth, oh, never mind. You will not understand the power and beauty of your youth. Until they've faded, but trust me, in 20 years, you'll look back. At photos of yourself and recall in a way you can't grasp now. How much possibility lay before you and how fabulous you really looked. You are not as fat as you imagine.". (side note: was pushing Ira up the first big hills, and heard "nice job dude!". Looked up, it was Jeff Dean.)

• 🏃🏻‍♂️ "physical journaling" love it. I tried to get Ira to remember her movements from last year and the year before, showed her videos of her previous run, walk, and crawl from years' past when we did the exact samething.

🏃🏻‍♂️ pre-mortem question w/ Shamir (a well-known YC exercise to avoid death). "Why our execution fails?". There are 6 questions that I want to answer this weekend:

• 🏃🏻‍♂️ What if we failed to build a wedge. No, focus and spread too thin (echoing your comment on trying to integrate everything is a sure sign of zero focus. By trying to cover brain age, muscle age, stress age, nutrition age, social age in one shot will dilute execiton).

• 🏃🏻‍♂️ We built for longevity enthusiast, not normal people. If the product is too intellectual, too quantified, too inside baseball, then we solved the science not the motivation. (note to self: been a personal trapping, need to build like Jeff, Steve, Elon, not act like Plato). Important reminder to self & you the simple truth, lifespan = science, healthspan = lifestyle. Everyone is motivated differently, so need to have a framework to generalize reward function. (note to self: 3d scans, vanity metrics, strava's kudos are good starting points to dig deeper).

• 🏃🏻‍♂️ IMO, fx health, biograph, insighttracker… are the roadster of longevity. Can we BYD now?

• 🏃🏻‍♂️ note to self: need to start up a thread on what will "starbucks X GNC X soulcycle" look like near university ave?

• 🏃🏻‍♂️ How do we crack the daily loop? Aging is a slow & invisible to the naked eyes, if we failed to turn it into a fast & visible feedback loop, the app will became yet another abandoned health tracking dashboard. No daily hook = zero retention.

• 🏃🏻‍♂️ AI will play role, i love your idea of a 3D scan to visaulize biomarkers.

• 🏃🏻‍♂️ Social layer. The BIG mountain to climb. I asked 3 friends during TKXing lunch (fi, donghui at czi, shamir), and I can sense they are hesitant to share personal health data in public settings. I got around it by being the 1st one to reveal my biomarkers. Shamir even said, he was embarrassed by his poor data. Fi felt it was too overwhelming (his brother has taken all FX health and dexascan tests). Without shared visibility, we won't achieve the deepest truth about "blue zones", secret to longevity is having communal experiences.

• 🏃🏻‍♂️ How do we obfuscate personal health data while making it fun, like transforming it into a game mechanic? For example in mario kart, they show ranking not actual scores. Can we do the same LDL-P to something more fun. Turn sensitive health numbers into identity, archetypes, quests, and trajectories, hide the data & publish the progression.

• 🏃🏻‍♂️ is there a basketball equivalent of Boston Marathon? Every serious runner chases after this ghost. (secretly, I still have qualifying for boston marathon as a bucketlist item… I missed it by 1 mins 19 seconds back in 2011 w/ Rafal). Sub 3:30 Marathon in 2026 = Top 10 of my 2026 goals.

• 🏃🏻‍♂️ need a 20-30 week long running plan to achieve a sub 3:30 marathon pace. One of the objective is to train and test out my fitness by March 1st (sunday) at Napa valley marathon. Will share, once I have enough data point to show I'm trending in the right direction.

• 🏃🏻‍♂️ create a virutal doppelganger cohort. People need NOT to share the same age, gender, location, lifestyle, professions. They only need to share the same biological signature. This is the brilliance of Strava segments. We can build a cohort system where each user is paired with healthspan doppelganers, who share similar biological clock. (variables to consider: aging velocity, sleep scores, VO2max, strength, stress patterns…). Our goal is to create a biological neighborhood that feels like them. A 43 yr old dad in MTV, a 27 yr old mom in Berlin, a 89 yr old in Shanghai…

• 🏃🏻‍♂️ atomic habits, core hyper-"local" loop: compete on aging velocity, compare deltas, celebrate % improvements, share rituals / wins&loss / protein strategies…

• 🏃🏻‍♂️ (note to self): if most social networks are interest based, and strava groups by fitness level, chat apps by friends/families, then we SHOULD group our customers by biology [parts?].

Stephen / Basketball 🏀

• 🏀 yup. we did castle rock mountain – which is our family tradition of black fridays. emma and etty grew up hiking hours every week. cleo quite a bit during covid. clementine was.. dragging yesterday.

• 🏀 all about habits. emma was hiking 2 hours before 18 months without any carrying since, whereas clementine until 3.5 year old.

• 🏀 daily reminder for the _, too: must go 100x deep on the ONE – "ai native".

• 🏀 but build a roadster 10 years before model 3? as long as we have a clear and easy path to the mass.

• 🏀 exactly – if we turn off our googler brains, and simply clone and scale fx health.

• 🏀 is kush making key.ai space happen? see moai 模合 below. why gnc the supplement store?

• 🏀 along with the actual toothbrush: a daily selfie (of face), voice journaling of health events / family activities / meditative reflections.. even work todo or planning like this doc.

• 🏀 yup, surprisingly possible but also none usable / used enough. (spren seems the most accurate?). with aaron: can 3d scans be more accurate than weekly body change?

• 🏀 indeed. probably too sensitive to ask for / talk about / share with you of my sisters' or mom' as our working dataset.

• 🏀 i like it: turning our body (twin!) into quests of a rpg game. a self-discovery or shared-partner journey is more appealing to me than climbing a leaderboard.

• 🏀 my top (performance) goal in 2026 is functional training for basketball. what's your highest abstraction of goals, if not chasing for p99.9 percentile (1000-quantile)? we can both focus on physical fitness in coming months, as we are probably p20 in muslce strength / core stability. you will focus on brain health next, even though already p90 in mental sharpness / stimulation. i want to 10x my basketball-specific skills next – which also involves neurological programming, neuromuscular repetition.. becoming a master of (court) geometry.

• 🏀 rank strength / stability training for basketball. i sprained my ankles many times this year. vertical reach is the easiest to measure and improve.

• 🏀 let's tell the world and make it happen!

• 🏀 is that your actual 2026 goal? vs my daily reality of playing against 20 other super fit and skilled at ymca. why so secretly, if already aiming p99 for every of 10 health goals?

• 🏀 nah – let's invite all friends to watch the finish line (vintage high school, at trower ave), and toast to your run!

• 🏀 so, my next few weeks – single-leg: eye-closed stance, romanian deadlift; core: side planks, cable core hold; glutes: deadlift, hamstring curls.

• 🏀 re: strava's segments, visualization (route map + heat map) is the magic for hyper-specific / hyper-local social. what's the equivalent for health and fitness?

• 🏀 some divergence here: i never chase any ranking or metric in life. you may say i keep scores on court, but not really as my motivations.

• 🏀 exactly. by visualization above, i meant dividing our body / muscle / organs in _ groups but the 3d whole is also a reminder of global optimization. my 300+ biomarkers definitely need _ levels of hierarchy. showing progress in blue for the body map, in green for p90.. make it intuitive for areas of improvement but also for the imbalance or over training.