feat: training zones — Daniels paces + Karvonen HR zones (v1.10.0)#80
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Summary
New
TrainingZonesmodule answering the runner's next question after VO2max: what pace should I train at?training_paces(vo2max)— personalized Easy/Marathon/Threshold/Interval/Repetition pace bands per km, inverting the Daniels & Gilbert (1979) velocity equation at each training intensity (%VO2max from Daniels' Running Formula)training_paces_from_race(distance_km, time)— convenience wrapper reusingestimate_vo2maxhr_zones(hr_max:, hr_rest:)— five Karvonen (Heart Rate Reserve) heart-rate zones using resting HRPaceBand,HrZone) with seconds and clock formatsValidation
Threshold pace at VO2max 50 matches Daniels' VDOT 50 table exactly (04:15/km); interval and repetition within seconds; easy band is a range heuristic.
Test plan
Release (
gem build+gem push) only after merge.