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.
⚕️ Medical disclaimer: The information on this page is for general wellness purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making changes to your training load or recovery protocol based on HRV data.
HRV & Running: what the research says
RMSSD
The gold-standard HRV metric for athletes — measures parasympathetic recovery via successive beat differences.
7-day
Rolling average smooths daily noise. Calio compares your daily reading to your personal 7-day baseline before coaching you.
ACWR
Acute:Chronic Workload Ratio combined with HRV trend gives the clearest picture of injury risk and readiness.
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.