Garmin HRM-RunPair your compatible Garmin device with the HRM-Run to get your heart rate and real-time feedback about your running formFeaturesHRM-Run has an accelerometer in the module that measures torso movement to calculate 3 running metricsCadence mdash the number of steps per minute It displays the total steps right and left combinedVertical oscillation mdash the bounce in your running motion It displays the vertical motion of your torso measured in centimetersGround contact time mdash the amount of time in each step that your foot spends on the ground while running measured in millisecondsLeft/right ground contact time balance mdash percentage of your ground contact time spent on the left or right footStride length mdash length of your stride measured in metersVertical ratio mdash ratio of your vertical oscillation to stride length

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