The data bridge behind LeCoach
What is Intervals.icu?
Intervals.icu is a free platform that connects and syncs with every major training and health platform: Garmin, Wahoo, Zwift, Apple Health and many more. LeCoach uses it as the data bridge between your devices and your AI coach.
Intervals.icu, explained
Intervals.icu is a free web platform built by David Tinker. It acts as a central hub for endurance athletes: one place where all your training and health data lives together, pulled in from the tools you already use like Garmin, Wahoo, Zwift, Apple Health and TrainingPeaks.
It does two jobs. It pulls activities and wellness data in from every platform that matters, and it pushes planned workouts back out to your bike computer, watch or Zwift so they show up on the right day, ready to ride.
That bidirectional sync is where Intervals.icu really shines. So rather than rebuild that layer, LeCoach sits on top of it: Intervals.icu handles the data plumbing; LeCoach handles the training plan generation, AI coaching and adaptive layer.
Who makes Intervals.icu?
Intervals.icu is an independent project built and maintained by David Tinker. It has been running for years and is used by tens of thousands of cyclists, runners and triathletes around the world. The core platform is free, actively developed, and has an optional supporter tier for people who want to back the project. There is no company or venture funding behind it, which is part of why it stays lean and focused on the athletes who use it.
Syncs with everything you already use
Whatever combination of devices and platforms you train with, Intervals.icu speaks their language.
Plus Oura, Withings, Fitbit and more. Full list on the Intervals.icu website.
How LeCoach and Intervals.icu work together
Data flows both ways, automatically, in real time.
Every ride, run, HRV reading and sleep score reaches LeCoach without you lifting a finger.
Workouts LeCoach creates land on your head unit, watch or Zwift on the right day, ready to ride.
Getting started takes a couple of minutes
No Intervals.icu account yet? We handle it inside LeCoach onboarding.
Sign up for LeCoach
Create your account with email or Google. Free 14-day trial, no card required.
Create your Intervals.icu account during onboarding
Already have one? Just connect it. If not, we open Intervals.icu right inside the onboarding flow. Sign up takes less than a minute.
Connect your devices to Intervals.icu
Garmin, Wahoo, Zwift, Apple Health, whatever you use. A few clicks each. Intervals.icu remembers the connections, so you never have to do it again.
You're done
LeCoach now sees your past activities, workouts and health data. Every workout and plan your AI coach creates lands on Garmin, Wahoo and Zwift automatically. Every ride you record flows back, and your coaching adapts.
Why LeCoach uses Intervals.icu
Every AI coaching product has to solve two very different problems. One is coaching: understanding an athlete's fitness, planning training, adapting to reality. The other is data plumbing: talking to Garmin, Wahoo, Zwift and every other platform reliably, in both directions, forever.
Intervals.icu has spent years on the second problem. Its sync is reliable and covers more platforms than most paid products. Rather than build a weaker version ourselves, LeCoach treats Intervals.icu as its data layer, and puts all of our engineering into the AI coaching layer that sits on top.
The result is broad device compatibility plus an AI coach that adapts to how you actually train. The data layer stays free. You only pay for the coaching.
Frequently asked questions
Ready to try adaptive AI coaching?
LeCoach sets up your Intervals.icu connection during onboarding. Free 14-day trial.
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