The validity of HRV results using wearables has been questioned in academia. Wearable devices usually adopt photoplethysmography (PPG), using the photo sensors in the device, rather than electrocardiograph (ECG) that is used in medical and strap based heart rate monitors (HRM), to measure HRV. The top wearable devices use algorithms to compensate for the inaccuracies… Continue reading Using wearables to measure HRV
Sounds like science fiction. It is science. It's not fiction.