BioResonance guide
How to use HRV readiness to know if you are ready for a hard training day
Use morning HRV, resting heart rate, subjective context, and training goals to decide when to push, maintain, or recover.
The useful question is whether today is meaningfully different from your own recent baseline, not whether your HRV matches someone else’s.
Start with your normal
The useful question is whether today is meaningfully different from your own recent baseline, not whether your HRV matches someone else’s.
Green day: push with context
If readiness is near or above baseline, resting heart rate is normal, sleep was adequate, and soreness is manageable, a hard session is usually easier to justify.
Yellow day: maintain or modify
If HRV is slightly suppressed, stress load is elevated, or sleep was poor, consider reducing volume, extending warm-up, or avoiding maximal intensity.
Red day: recover intelligently
If HRV is well below baseline, resting heart rate is elevated, and subjective fatigue is high, recovery work, mobility, Zone 1/2 movement, or resonance breathing may be a better investment.
Competition preparation
Before races or events, HRV trends can help identify whether a taper is working, whether travel is disrupting recovery, and whether nervous-system arousal is unusually high.
Scientific references and further reading
The guide above is educational, not medical advice. These sources support the scientific framing:
- Task Force of ESC/NASPE. Heart rate variability: standards of measurement, physiological interpretation and clinical use. Circulation. 1996.
- Bellenger et al. Monitoring Athletic Training Status Through Autonomic Heart Rate Regulation. Sports Medicine. 2016.
- Plews et al. Training Adaptation and Heart Rate Variability in Elite Endurance Athletes. Sports Medicine. 2013.
- Buchheit. Monitoring training status with HR measures. Frontiers in Physiology. 2014.
- Goessl, Curtiss & Hofmann. HRV biofeedback training on stress and anxiety: meta-analysis. Psychological Medicine. 2017.
- Lehrer & Gevirtz. Heart rate variability biofeedback: how and why does it work? 2014.
- Shaffer & Meehan. Practical Guide to Resonance Frequency Assessment for HRV Biofeedback. 2020.
- Lalanza et al. Methods for HRV Biofeedback: systematic review and guidelines. 2023.
- Capdevila et al. Resonance frequency is not always stable over time. Scientific Reports. 2021.