The Garmin HRM4-Run is a low-profile chest strap that measures and shares data in real time while running, cycling or swimming. This heart rate monitor integrates with Garmin smartwatches and fitness trackers, including the Fenix® and Forerunner® series. When paired with your Garmin device, it creates a wireless analytic powerhouse that assesses data points for 6 running dynamics: cadence, stride length, ground contact time, ground contact balance, vertical oscillation, and vertical ratio. The more you know the better, at least while training.
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