Trusting Apple Watch for HRV: how accurate are the readings?
HRV (Heart Rate Variability) is one of the most reliable ways to assess the state of a person’s nervous system. Any modern wearable device, whether it’s a watch, bracelet, or ring, measures stress levels or readiness for exercise based on HRV. Apple Watch is no exception. Although the watch itself does not calculate stress or recovery levels, it collects all the necessary HRV data from automatic HRV measurements, which can be analyzed by third-party app developers. But how trustworthy are these measurements?
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