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Marc-André Bombeck
f1ca0e28eb
Map day-total Banister TRIMP to 0-100 against a personal reference -- the EWMA-smoothed 75th percentile of the user's own training-day TRIMP over a 42-day chronic window -- instead of the fixed population anchor that pinned a deconditioned or chronic-condition user near 0 regardless of their effort. Below a 7-training-day cold-start floor the engine falls back to the population anchor, recorded as anchor: population with lower confidence; at or above it the personal anchor takes over. Always writes a score row -- no new null gate. The anchor is derived from the TRIMP input, never the 0-100 output, so there is no circular feedback; rest-day zeros stay out of the training-day distribution. Add a server-internal per-(user, day) strain_trimp_cache (day-total TRIMP + running EWMA reference + anchor) so the chronic window reads cheap cached values instead of re-integrating 42 days of HR series each night. The cache is not a Measurement -- it stays out of every user-facing surface, the doctor PDF, and the FHIR bundle by construction. No backfill: the nightly idempotent recompute populates the cache forward and self-heals, falling back to the population anchor until enough personal history accrues. Keep the Banister/Morton/Tanaka citations and the doctor-PDF exclusion; the honesty copy now states the scale is relative to the user's typical effort, with a general reference during cold start.