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Marc-André Bombeck
6935feda15
Derive a daily cardio-load proxy from the per-workout heart-rate series plus active energy. Each workout's HR series scores via Banister's gender-weighted exponential TRIMP over the fractional heart-rate reserve (Tanaka age-predicted HRmax, the user's resting HR); the day's TRIMP totals map to a 0-100 saturating scale. Days with no usable HR series but a non-trivial active-energy total fall back to an energy-only proxy, with the path recorded in the result. Stored as a COMPUTED STRAIN_SCORE row, idempotent per user per day, gated when neither a usable HR series nor active energy is present. Standard: Banister 1991; Morton, Fitz-Clarke & Banister 1990 (TRIMP); Tanaka, Monahan & Seals 2001 (HRmax).