Athlete AI Weekly · 69 posts
Everything we have built, learned and shipped with AI and training data.
Weekly recaps from the Athlete AI Community, step-by-step guides for Claude, ChatGPT, Garmin, Strava, WHOOP and COROS, and the gear and science news worth your time.
Latest
Weekly Recap · October 12, 2026
Week 16: We Are Live! The 4-Week Fitness App Challenge
1,202 members, five new guides, and the 4-Week Fitness App Challenge is open through Sunday.
Guide · October 9, 2026
Stop Doing These 5 Things When You Train With AI
The 5 habits that keep ChatGPT and Claude guessing about your training, and what to do in place of each one.
Guide · October 8, 2026
How Many of These 20 Do You Know?
The 20 things it takes to actually train with AI, in order. The first 4 get you going.
Weekly Recaps
Every Monday since week one: what the community shipped, what is coming, and how it grew.
- October 12, 2026Week 16: We Are Live! The 4-Week Fitness App Challenge1,202 members, five new guides, and the 4-Week Fitness App Challenge is open through Sunday.1 MIN
- October 5, 2026Week 15: 6 Ways to Put Meta's Muse to Work on Your Training1,166 members, six Muse builds you can copy, a WHOOP replacement app, and Labs doors opening October 12.1 MIN
- September 28, 2026Week 14: Athlete AI Labs Opens October 121,116 members, the Labs founding cohort is announced, and new guides on the COROS Pace 4 Pro and COROS MCP write access.2 MIN
- September 21, 2026Week 13: The Final Week of Most Miles1,095 members, WHOOP and Hevy integrations with Claude, and a team backyard ultra on the table for 2027.1 MIN
- September 14, 2026Week 12: 1,000 Strong1,039 members, a 10-point race in Most Miles in a Month, and guides to the WHOOP API and wearable data access.1 MIN
- September 7, 2026Week 11: Off to the Races977 members, Most Miles in a Month is underway, and new builds for jump height, squat form and elite training data.1 MIN
- August 31, 2026Week 10: Team Apollo vs Team Poseidon930 members, Most Miles in a Month kicks off, and the wearable subscription screens get rebuilt for free.1 MIN
- August 24, 2026Week 9: Most Miles in a Month876 members, two teams of eight, a first sponsor, weighted scoring across four sports, and six new builds.2 MIN
- August 17, 2026Week 8: The First Team Event Is Locked835 members, Most Miles in a Month wins the vote, and seven new guides on VO2 max, heart rate zones and new watches.1 MIN
- August 10, 2026Week 7: The Free Track Is Finished789 members, the Telegram fitness agent lesson completes the free Athlete OS track, and the event format goes to a vote.1 MIN
- August 3, 2026Week 6: The Results Are In691 members, the newsletter launch, nine new guides and prompts, and a virtual format for the first team event.2 MIN
- July 27, 2026Week 5: The Team Event Poll585 members, a recovery protocol, a Strava crown finder, and a vote on the first community event.1 MIN
- July 20, 2026Week 4: What 472 Athletes Want From AISurvey results: 90% are athletes training for themselves, 39% want to build apps, and 60% want team events.1 MIN
- July 13, 2026Week 3: I Need Your Input363 members in three weeks, a community survey to set the roadmap, and two new skills.1 MIN
- July 5, 2026Week 2: 10x GrowthThe community grew from 24 to 241 members in seven days, and the Day 8 overtime lesson shipped.1 MIN
- June 26, 2026Week 1: It's Just the BeginningThe Athlete AI Community launched, 24 athletes joined, and the first skills and prompts shipped.1 MIN
Guides & Builds
Step-by-step builds, prompts and breakdowns for training with your own data.
- October 9, 2026Stop Doing These 5 Things When You Train With AIThe 5 habits that keep ChatGPT and Claude guessing about your training, and what to do in place of each one.2 MIN
- October 8, 2026How Many of These 20 Do You Know?The 20 things it takes to actually train with AI, in order. The first 4 get you going.1 MIN
- October 8, 20266 GitHub Repos That Replace Your Fitness AppsThere is a free public repo for pretty much every fitness app we pay for. Paste the link into Claude Code and it installs it for you.1 MIN
- October 8, 2026Claude + Endurain = Your Own StravaA free open source repo that does what Strava does, on your own computer. Claude installed it and loaded my last 45 days of training.1 MIN
- September 29, 2026GrokBot / SpaceX AI Meetup TakeawaysI spoke about our community at a GrokBot and SpaceX AI meetup. My top three takeaways for anyone building with agents.1 MIN
- September 28, 2026Meta Muse Is Actually LegitMeta waited, watched, and built something useful. My top 5 fitness and top 5 life prompts for Muse.1 MIN
- September 23, 2026COROS Officially Overtakes GarminCOROS just opened write access to its MCP. Build custom training plans with Claude or ChatGPT, no developer credentials needed.1 MIN
- September 22, 2026The New COROS Pace 4 ProBigger, lighter, cheaper than the Fenix 9, with 60 hours of GPS. A side-by-side comparison.1 MIN
- September 17, 2026Google's New Runner-Specific Search ModeGoogle quietly launched running plans, run playlists and race-specific gear search. What works, and what's missing.1 MIN
- September 16, 2026Hevy + Claude Code IntegrationConnect your Hevy strength data to Claude Code, backfill old plans, and spin up a training dashboard.1 MIN
- September 15, 2026Skills & Prompts Library, Vol. 3: August–SeptemberCustom Zwift workouts, 20 Endorphins prompts, a team challenge tracker, and my top 5 WHOOP prompts.2 MIN
- September 14, 2026Wearable API Tiers, Ranked (September 2026)From S tier to F tier: which wearables make it easy to build with your data, and which lock it down.1 MIN
- September 14, 2026The WHOOP API GuideWHOOP has one of the simplest APIs to connect to, making it the perfect place to learn. Plus: rebuilding its orb.1 MIN
- September 14, 2026ChatGPT and the Navier-Stokes ProblemWhat I got wrong about the headline, and the one thing it still tells us about where AI is heading.1 MIN
- September 14, 2026Seedance AI Video GuideMy process for AI video comes down to two things: a great starting frame and prompting the way the model thinks.1 MIN
- September 6, 2026How Do the Elites Train? An AI Study of Ethiopian MarathonersAI analyzed the training of 14 elite Ethiopian marathoners. Five takeaways, and a prompt to train more like them.1 MIN
- September 3, 2026Improving Squat Form With Claude CodeThe same vision framework as the vertical leap model, pointed at depth, hip mobility and symmetry.1 MIN
- September 3, 2026Measuring Vertical Leap With ClaudeTwo independent methods, one phone video, and an honest number (mine was just shy of 20 inches).1 MIN
- September 1, 2026Can We Make It Better? Part 5: The Best of Oura, WHOOP and StravaThe series capstone: taking the best of each app and combining it into one custom UI.1 MIN
- August 28, 2026Can We Make It Better? Part 4: WHOOP Health & Recovery ScreensNearly every WHOOP screen can be recreated with Garmin data, including a fun pace-of-aging formula.1 MIN
- August 26, 2026Can We Make It Better? Part 3: Garmin's New Epic FeatureGarmin's new flagship feature bundles activities into one "Epic." I rebuilt it for free with the Garmin connection we already have.1 MIN
- August 25, 2026Can We Make It Better? Part 2: Strava Athlete IntelligenceStrava's premium AI layer mostly repeats your own notes back to you. Here's a version that actually gives actionable insight.1 MIN
- August 24, 2026Can We Make It Better? Part 1: Oura's Sleep ScreenOura is being sued over its sleep staging. So I rebuilt its sleep screen from my own Garmin data, and checked 54 nights.1 MIN
- August 22, 2026Build Your Own 90-Day Strength ProgramA prompt that grounds itself in your data, interviews you, and researches the evidence-based program for your discipline.1 MIN
- August 15, 20264 Beginner-Friendly Claude Chat PromptsNot ready for Claude Code? Four prompts you can run from your phone that build on each other, from raw data to dashboard.1 MIN
- August 15, 2026What Is vVO2 Max and Why Is It the Real Gold Standard?The best predictor of running performance isn't VO2 max. It's the slowest speed at which you hit it. Here's how to test yours.1 MIN
- August 15, 2026What Makes You Faster: VO2 Max or Running Economy?The size of your engine vs. your miles per gallon, and which one you should be training right now.1 MIN
- August 10, 2026COROS August Update BreakdownCOROS is the only major watch brand with its own MCP. Plus better sleep tracking, live tracking and smarter heart rate data.1 MIN
- August 7, 2026Building Your Athlete OS: The Advanced SeriesGive your AI coach a brain, a 3D command center, its own website, and a way to text you back.2 MIN
- August 4, 2026Beat the Mile 20 Wall: Marathon Fueling & Gut TrainingHitting the wall isn't a mystery. It's math. Here's the fueling math, and a prompt that builds your gut training plan.1 MIN
- August 2, 2026How to Tell if Your Long Run Actually WorkedThe one number that tells you whether a long run did its job, and almost nobody looks at it: aerobic decoupling.1 MIN
- August 2, 2026Which Race Predictor Is Right: Strava or Your Watch?Garmin, COROS and Strava predict your race times in completely different ways. A 1977 formula helps you decide which to trust.1 MIN
- July 31, 2026Spotify Running Mode: Improving Cadence With MusicSpotify's new Running Mode defaults to 150 BPM. Here's the number you should actually use, and a plan to make it stick.1 MIN
- July 30, 2026Heat Training, Done RightTwo course records fell at Badwater. Here's what the research says makes a good heat block, and a prompt that builds yours.1 MIN
- July 30, 2026Skills & Prompts Library, Vol. 2: JulyTen skills and prompts from July: race and HYROX predictors, a coach clone, KOM hunting, shoe fitting and more.3 MIN
- July 28, 2026ChatGPT Health: Setup Tips & Prompts for AthletesHow to connect Apple Health and your medical records, plus 10 prompts, and why athletes need to add context.1 MIN
- July 27, 2026The Complete Intervals.icu Setup GuideConnect almost any wearable, build structured workouts, and send them back to your watch, all through your Athlete OS.1 MIN
- July 24, 2026The Athlete Nap ProtocolThe 20-minute power nap rule doesn't hold for endurance athletes. Here's what 12 sleep studies say instead.1 MIN
- July 19, 2026Running Form AnalyzerFilm 30 seconds side-on and get your cadence, overstride and trunk lean graded against published research.1 MIN
- July 7, 20264 Ways I'm Using AI to Further My TrainingFrom a portable coach skill to an AI with a brain: the four builds that take the 7-Day Challenge to the next level.1 MIN
- July 6, 2026Team Win: The Updated Garmin + Claude GuideA community member red-teamed our Garmin setup and made it far more secure. Here's what changed.2 MIN
- July 6, 2026AllTrails + Claude: Trail Running & Hiking HeavenAllTrails now has an official Claude connector. Here's how to set it up in five steps.1 MIN
- July 5, 20267-Day Challenge, Day 8: OvertimeThe bonus finale: get your AI coach off the laptop with a Gmail morning brief and Remote Control from your phone.1 MIN
- July 5, 2026Claude + Roboflow = Bike Fit AnalyzerTwo open-source vision repos, one phone video, and a bike fit that went all green in 20 minutes.1 MIN
- July 5, 2026Claude Chrome Extension = Ultimate Route PlannerHow I planned a self-supported 50K, coffee stops and all, and sent the GPX straight to my watch in minutes.1 MIN
- July 1, 2026NFC Tag iPhone Safety AutomationA five-minute iPhone setup that texts your location and calls for help with a single tap of your watch.1 MIN
- June 30, 2026MCPs vs. APIs: How to Get Your Strava, WHOOP and Oura DataTwo ways to connect Claude to your fitness apps, when to use each, and how to set them up.2 MIN
- June 30, 2026Claude Nutrition & Macros TrackerSkip the paid calorie apps. Build a fully customizable macro tracker right inside the Claude mobile app.1 MIN
- June 29, 2026Skills & Prompts Library, Vol. 1: JuneSix skills and prompts from the community's first month: an accountability coach, race research, a run coach on Gemini and more.2 MIN
- June 18, 2026Race Vault: One Directory for Every RaceFinding your next race shouldn't take 15 websites. An early look at a directory that pulls them all into one place.1 MIN
Athlete AI Weekly
The AI, gear and science news that matters for your training, with a take on each one.
- August 14, 2026How to Avoid Running AI SlopThe models aren't dumb, you are just bad at providing context and prompting, but you can easily fix both.8 MIN
- August 7, 2026The World is Changing... Learn It Through Fitness.You've never had more access and control over your own data than right now. Use this time to learn how to build something that you can actually use.8 MIN
- July 31, 2026Goodbye Apps, Hello DataThe traditional consumer app experience is vanishing before our eyes7 MIN