Runalyze, the German training analysis platform used by serious endurance athletes, launched an official MCP server on 9 June. MCP, the Model Context Protocol, is the glue between a chat app and your personal data, letting an AI tool read your Runalyze account directly once you permit it. It is open only to paying members and is still in testing. You can connect on the Runalyze settings page.
The launch follows COROS in May and Strava in June.
COROS opened a single source: activities recorded on a COROS watch. Strava is different. It already receives uploads from Garmin, Wahoo, COROS, and dozens of other devices, so its MCP draws on whatever an athlete has synced, not just Strava-native recordings. Runalyze works the same way and goes further. Athletes use it to bring everything together, feeding in from Garmin, Polar, Suunto, COROS, Whoop, Oura, and more. Where Strava shares activity and route data to AI, Runalyze adds a full health layer on top!
The data on offer is the broadest of any sports MCP so far, training and health combined in one place. Activities, splits, and VO2max estimates sit alongside training metrics: CTL, ATL, TSB, acute:chronic ratio, training monotony and strain, marathon shape, HRV baseline and normal range. The health data adds sleep stages and quality, overnight heart rate, respiratory rate, resting heart rate trends, weight, body composition, blood glucose, blood pressure, body temperature, stress, mood, fatigue, daily notes, injuries, and illness logs.
An athlete who has used Runalyze for three years and connected every device they own is handing Claude an unusually detailed longitudinal training record.
The questions Claude can answer go well beyond workout summaries. How did HRV respond during the heaviest training weeks of a marathon build? What changed before a personal best? Is fatigue rising faster than fitness? Runalyze already answers these questions inside its own interface. The MCP makes the same answers available in plain conversation, with no dashboards to navigate.
That is where the risk to Runalyze lies, but it is smaller than it first appears. Runalyze’s outputs are calculated figures, rather than raw data. The MCP hands over what Runalyze has already calculated: the VO2max estimate, the TSB figure, and the HRV baseline. Claude gets the answer, not the method behind it. Runalyze maintains control over how its numbers are produced, the same position COROS took when it shared summary training load through its MCP but withheld per-second GPS and heart rate data.
The real pressure falls elsewhere. Coaching platforms in the TrainingPeaks category exist mainly to turn training data into recommendations. They now face an AI assistant that can perform a version of the same job on a broader dataset and explain its reasoning in ordinary language. That is a harder position to defend than Runalyze’s.
Hardware makers are not threatened at all. No MCP connection, however complete, can produce a GPS track, a heart rate reading, or a power figure. That core data must always come from a physical device. AI competes with the analysis, not the recording. The device stays essential, but its role narrows. If the insight moves to a chat tool that reads from any brand equally, the watches start to look interchangeable, and the lock-in that came from each company’s own app weakens.
The athletes most likely to connect to this quickly are those already using Runalyze. They run multiple devices, perhaps from multiple device platforms.
Across COROS, Strava, and now Runalyze, sports platforms are opening their data to AI faster than most would have predicted a year ago. Each connection widens what AI can reason about.
Takeaway
Once AI can ‘correctly’ reason, apps and platforms will disappear. Once hardware vendors open up to AI they become swappable.
That is the essence of the threat facing the entire industry.
Last Updated on 3 October 2026 by tfk the5krunner
Small things I always use
- Garmin 90-degree charging adapter: Charges your Garmin from any USB-C cable. Essential when travelling. I use one.
- Body Glide: The blue anti-chafe stick swimmers and runners carry. I use it.
- Speedo earplugs: Fewer ear infections and no cold-water dizziness. I use them.
- Dryrobe Advance: My winter changing robe for open-water swims. I use one. A cheaper option is the AONYIYI changing robe.
- Maurten: Race fuel that stays easy on the stomach. I use them.
- Beet It Sport nitrate shots: Beetroot shots I take in the days before a race. I use them.
- Garmin charging puck: The quickest way to top up before a session. I use one.
- Injinji: Toe socks that stop rubbing, so you run more. I use them.
- Ultimate toe protectors: Stop black toenails on long runs. They work. I use them.
- Compressport R2 v2 calf sleeves: My calf sleeves of choice. I use them.
- Cellucor C4: My pre-workout before hard sessions.
- TPU tubes: Schwalbe Aerothan, Tubolito and Pirelli SmarTube. Light, tiny spares. I use all three.
- G8 insoles: Adjustable insoles that are good. I use them.
- Cycplus Cube: A 97g electric pump that gets a road tyre rideable in two minutes. I carry one. 5% off with code THE5KRUNNER.
Watches and sensors
- Polar H10: My daily driver for waking HRV.
- Polar Verity Sense: My backup arm-worn HR sensor.
- Nomad bedside charger: Charges my iPhone and Apple Watch overnight. I use it, and many of their bands.
- Train.Red: The best muscle oxygen sensor I’ve used.
- Tymewear: Accurate heart rate and reliable ventilatory zones. I use it to pace endurance rides over an hour.
- Garmin Forerunner 970: A pro-grade triathlon watch. I use this.
- Apple Watch Ultra 4: My daily smartwatch. No phone needed on rides.
- Garmin Fenix 9 Pro: I’ve just bought one.
On the bike
- Continental GP5000 for everyday riding, and Aero 111 on the front for special occasions.
- Helmets: Specialized S-Works Evade 3 for road riding, and Rudy Project Wing for TT-style races. I use both.
- Ravemen FR300: A front light that mounts under your Garmin or Wahoo. I use one.
- Ravemen FR1000: The light and the computer mount in one unit, so nothing else goes on the bars. Better than mine.
- Ravemen FR1500SE: 1,500 lumens hanging under your Garmin, for proper night rides.
- Ravemen FR1100SE: 1,100 lumens under your Garmin, and up to 46 hours on slow flash.
- Ravemen FR500: A brighter FR300 with the same mount.
- Wahoo TRACKR Radar: I use it on one bike and Varia on the other. They perform the same.
- Garmin Varia RTL515: Radar that warns you of cars from behind. I use this model.
- Wahoo ELEMNT Roam 3: The bike computer that’s easy to use. I use mine on most rides.
- Favero Assioma Pro RS2: Accurate power pedals that swap easily between bikes. I use this model.
Home and indoor training
- NPE Runn: Makes my basic treadmill smart, sending more accurate speed and distance to my watch and Zwift. I use it.
- Google Wifi: Keeps Zwift connected in my pain cave. I use it.
- Apple TV 4K: Zwift on the big screen. I use two.
- Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home. I use it.
Health, recovery and sleep
- FreeStyle Libre 3 Plus: Shows how my blood sugar responds to diet.
- hDrop: Measures my sweat loss in summer and indoors.
- Fourth Frontier Zone: Checks my heart under load in hard sessions.
- Kineon MOVE+: Red and infrared light for sore knees, Achilles and other joints after hard training. I use it.
- Oura Ring 5: My partner’s recovery tracker of choice.
- Eight Sleep: A cooling mattress cover my partner and I use nightly.
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. See the gear tfk uses. ID
