![Sensors | Free Full-Text | Validation of the Apple Watch for Heart Rate Variability Measurements during Relax and Mental Stress in Healthy Subjects Sensors | Free Full-Text | Validation of the Apple Watch for Heart Rate Variability Measurements during Relax and Mental Stress in Healthy Subjects](https://pub.mdpi-res.com/sensors/sensors-18-02619/article_deploy/html/images/sensors-18-02619-g001.png?1570359244)
Sensors | Free Full-Text | Validation of the Apple Watch for Heart Rate Variability Measurements during Relax and Mental Stress in Healthy Subjects
![Heart rate variability displayed in the Apple Health App, 1-month timescale | Download Scientific Diagram Heart rate variability displayed in the Apple Health App, 1-month timescale | Download Scientific Diagram](https://www.researchgate.net/publication/360957487/figure/fig7/AS:1182642905059349@1658975449980/Heart-rate-variability-displayed-in-the-Apple-Health-App-1-month-timescale.png)
Heart rate variability displayed in the Apple Health App, 1-month timescale | Download Scientific Diagram
![Anyone else getting HRV readings in the 100+ zone? I can't seem to find any good information on this. : r/AppleWatch Anyone else getting HRV readings in the 100+ zone? I can't seem to find any good information on this. : r/AppleWatch](https://preview.redd.it/kj99h29teag01.jpg?auto=webp&s=63da93486de66bdc20e5a2b2f512f7927104ead8)
Anyone else getting HRV readings in the 100+ zone? I can't seem to find any good information on this. : r/AppleWatch
![Apple Watch Heart Rate Variability Accuracy and Insights From 3.5 Years of Measurements : r/AppleWatchFitness Apple Watch Heart Rate Variability Accuracy and Insights From 3.5 Years of Measurements : r/AppleWatchFitness](https://external-preview.redd.it/FdoS0jJi4wrlilcAD3C49Y-w4YTKauyX5zZueArFbxU.jpg?auto=webp&s=c1747d6eef469f1cfc28f8bce2ea897c48ecd0da)
Apple Watch Heart Rate Variability Accuracy and Insights From 3.5 Years of Measurements : r/AppleWatchFitness
![Estimation of Heart Rate Variability Measures Using Apple Watch and Evaluating Their Accuracy: Estimation of Heart Rate Variability Measures Using Apple Watch | Semantic Scholar Estimation of Heart Rate Variability Measures Using Apple Watch and Evaluating Their Accuracy: Estimation of Heart Rate Variability Measures Using Apple Watch | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/565757691f2c3fbeee364d14a8d1256fa3f62f37/4-Figure3-1.png)
Estimation of Heart Rate Variability Measures Using Apple Watch and Evaluating Their Accuracy: Estimation of Heart Rate Variability Measures Using Apple Watch | Semantic Scholar
![Heart Rate Variability from Apple Watch 4 vs. a Nexus 10 Biofeedback unit. Quite similar! : r/AppleWatch Heart Rate Variability from Apple Watch 4 vs. a Nexus 10 Biofeedback unit. Quite similar! : r/AppleWatch](https://i.redd.it/az68eo39xcr11.jpg)