Garmin's HRM 600 heart rate chest strap adds to the running dynamics recorded by a Garmin watch, including step speed loss.

Related: The 57 Best Amazon Prime Day Health & Fitness Deals Are Up to 91% Off I’m a Commerce Editor at Health, and I’ll admit it—I'd never seriously considered using a heart rate monitor.

It seems like within the last ten years, every other gadget to be released has some sort of heart rate monitoring capability. Most modern smartwatches can report your BPMs, and we’ve even seen ...