Personal physiology lab + cycling-training brain for Android. Real RMSSD HRV from BLE chest strap, CAR detector, orthostatic test, physics-model power, polarized 80/20 compliance, multi-sport TSB, snapshot-persisted trends. Sovereign data. Free forever.

Three-class football player fatigue prediction from PAMAP2 wearable IoT data. Karvonen heart rate labeling, SMOTE balancing, LOSO cross-validation, personalized Random Forest. 97.96% LOSO accuracy + coach substitution-alert dashboard.