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Body Composition Tracking

Status: ✅ Complete
Last Updated: 2026-01-19

Overview​

Complete body composition tracking system with weight, body fat percentage, lean body mass, BMR calculations, progress photos, and comprehensive analytics.

Implementation Details​

Backend (Complete)​

  • ✅ Database schema (BodyMeasurement, ProgressPhoto models)
  • ✅ BodyCompositionService with calculations (BMI, BMR, LBM, FFMI, waist-to-hip ratio, trends)
  • ✅ API routes (GET/POST/PUT/DELETE measurements, photos, profile)
  • ✅ Comprehensive backend tests (77 service tests, 56+ route tests)

Frontend (Complete)​

  • ✅ BodyCompositionPage with profile panel, overview cards, charts, history table
  • ✅ TodayBodyComposition component for daily weight logging
  • ✅ WeightLogModal for quick weight entry
  • ✅ ProgressPhotoModal for photo uploads
  • ✅ Timeline view and compare mode for progress photos
  • ✅ Daily checklist integration (WEIGHT_LOG item)
  • ✅ Gamification integration (XP awards)
  • ✅ Comprehensive frontend tests

Features​

  • ✅ Static body profile (height, shoe size, sex, birthdate)
  • ✅ Automatic calculations (BMI, BMR, LBM, FFMI, waist-to-hip ratio)
  • ✅ Trend tracking (7/14/30/90 day deltas)
  • ✅ Progress photos with pose tagging
  • ✅ Correlations with sleep, mood, food, workouts
  • ✅ Plateau detection and rate-of-change warnings

See docs/project/TODO.md lines 105-163 for detailed implementation notes.