jm00 comments on Monitoring devices I have loved

[jm00]

I’m not really an expert on HRV, I just trusted the validation study here:

https://​​www.researchgate.net/​​publication/​​315059917_Comparison_of_Heart_Rate_Variability_Recording_With_Smart_Phone_Photoplethysmographic_Polar_H7_Chest_Strap_and_Electrocardiogram_Methods