LeCoach doesn't measure anything itself — your wearable does. The chain is: your device → Intervals.icu → LeCoach. Setup guide: Syncing wellness data from your wearable.
HRV
Most watches measure HRV overnight (Garmin, Whoop, Oura, Polar and others), which lands in Intervals.icu daily. Different devices report different HRV flavors — rMSSD is the common one, some report SDNN, and HRV4Training users get their own value. LeCoach picks the right one automatically — you don't need to configure anything.
Measurement tips: consistency beats gadgetry. Same device, every night (or the same morning protocol if you measure manually with a chest strap and an app like HRV4Training). Don't compare absolute values across devices — LeCoach compares you to your own baseline, so consistency is what matters.
Resting heart rate
Taken from your device's overnight/daily value via Intervals.icu. Devices differ (lowest overnight value vs sleeping average) — again, the baseline logic makes your trend comparable regardless of the method, as long as the device stays the same.
Sleep
Sleep duration, sleep score and sleep quality come from whatever tracks your sleep into Intervals.icu. Sleep-stage guesses from wrist devices are estimates — LeCoach leans on duration most (it's the most reliable signal) and uses the score as a secondary input.
Checking today's values
Open the day view — the wellness card shows today's HRV, resting HR and sleep, and Analytics shows the trends. All of it feeds your recovery score.