The HRV Health apps only work with H9 and H10 Polar heart rate monitors: which one should you get? The Polar H9 and H10 heart rate monitors are the only commercially available consumer devices that provide data that is accurate enough to measure heart rate variability. The H10 costs is almost 50% more than the… Continue reading Which heart rate monitor should you get
Sounds like science fiction. It's science, not fiction.