Short answer: LeCoach ingests DFA alpha-1 data, and your coach can discuss it — but there's no dedicated DFA screen or automated use yet.
DFA alpha-1 is an HRV-derived metric recorded *during* exercise (e.g. via the AlphaHRV data field or apps like Fatmaxxer) that estimates where you sit relative to your aerobic threshold — values around 0.75 are commonly linked to the aerobic threshold.
What works today
If your rides carry DFA alpha-1 data into Intervals.icu (recorded with a good chest strap), LeCoach syncs the per-interval average values along with artifact percentages. Your coach can reference them when you analyze a ride together — ask 'what did my DFA alpha-1 do during the long intervals?'.
What doesn't exist (yet)
No DFA chart in Analytics, no automatic threshold estimation from DFA, no DFA-based workout targets. Would you like deeper DFA alpha-1 support? Request or upvote it on our feature board.
Practical note
DFA alpha-1 is sensitive to measurement quality — use a chest strap, watch the artifact percentage (keep it low single digits), and treat single-ride values with skepticism. Trends over similar rides are where the signal lives.