Everything you ever wanted to know about the Garmin HRM-RUN

When the Garmin FR620 first came out about 18 months ago, it brought with it the Garmin HRM-RUN strap. That strap added what Garmin called ‘Running Dynamics’ data, which consisted of a few different running related metrics. At the time,
Can't quite figure out what Running Dynamics are, or which device you need? Ask no more! Everything you ever wanted to know about it here.

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The HRM-Run heart rate monitor provides advanced running metrics to Garmin Forerunner running watches. The strap is seamlessly comfortable and easily adjustable while the module is small, lightweight and fits entirely within the width strap.