HRV Science for Athletes
HRV Tracking for Running
Stop guessing when to train hard and when to recover. Use your heart rate variability data to make smarter Running training decisions every day.
Why HRV Matters for Running
Runners need HRV monitoring to balance high-mileage weeks with adequate recovery. HRV drops significantly after threshold runs and long slow distance — Calio detects these patterns and tells you exactly when your nervous system has recovered enough for the next quality session.
Built for Running Athletes
Personalized Recovery Score
Your score is calculated from your own 60-day HRV baseline — not generic population averages.
Training Load Management
ACWR-based guidance keeps your acute-to-chronic workload in the optimal zone.
Sleep Intelligence
Track sleep debt and get bedtime recommendations that account for tomorrow's training.