Not OP but I go for daily runs and engage in HIIT exercise and found that the Schosche armband is about as accurate as you can get outside of a chest strap (whi

Not OP but I go for daily runs and engage in HIIT exercise and found that the Schosche armband is about as accurate as you can get outside of a chest strap (which I personally find distinctly uncomfortable to wear). https://www.scosche.com/scosche-rhythm-plus-2-0-heart-rate-monitor-armband https://www.scosche.com/scosche-rhythm-plus-2-0-heart-rate-m...