How HRV, ATL, and CTL Drive Training Adaptations

Integrating recovery and workload metrics

A training plan is only as good as your ability to absorb it. By tracking your CTL (Chronic Training Load / Fitness) and ATL (Acute Training Load / Fatigue), you can calculate your TSB (Training Stress Balance / Freshness). But fitness numbers only show workload history, not current recovery capacity.

By connecting overnight biometrics like **HRV** (Heart Rate Variability) and Resting Heart Rate (RHR), we get the full picture:

HRV & Load Coaching Logic

When your HRV is in your normal range, PacePartner maintains your scheduled CTL progression. If your HRV drops below your baseline (indicating high autonomic stress), PacePartner automatically adapts your calendar: it trims volume, caps intensity, or inserts active recovery, preventing overtraining before it shows up in your ATL metrics.