BioResonance guide
HRV readiness test: what it can tell you about recovery, stress, and your nervous system
A practical guide to what HRV readiness can and cannot reveal about recovery, stress, sleep, fatigue, and autonomic nervous system state.
A readiness test is a controlled snapshot of how your autonomic nervous system is behaving today compared with your own recent baseline. It can suggest whether your body looks recovered, stressed, under-slept, overreached, or simply different from normal.
The short answer
A readiness test is a controlled snapshot of how your autonomic nervous system is behaving today compared with your own recent baseline. It can suggest whether your body looks recovered, stressed, under-slept, overreached, or simply different from normal.
What BioResonance measures
A morning test combines heart rate, beat-to-beat RR intervals, RMSSD-style vagal HRV, SDNN-style variability, signal quality, PNS/SNS balance, stress index, and recording stability. The app summarizes those into Recovery, Stress Load, and Nervous System Balance so the result is not just one mysterious number.
What a low score can mean
A lower-than-baseline score can follow hard training, poor sleep, alcohol, dehydration, psychological stress, travel, heat, illness onset, or noisy measurement. That is why BioResonance emphasizes trends and context instead of panic over one reading.
What it cannot tell you
HRV readiness is not a diagnosis, lab test, or medical clearance. It cannot identify disease, guarantee injury prevention, or replace judgment from a coach or clinician. It is a decision-support signal.
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.