Running Dynamics

Running dynamics is real-time feedback about your running form. Your fēnix® watch has an accelerometer to calculate five running form metrics. For all six running form metrics, you must pair your fēnix watch with the HRM‍-Fit™, HRM-Pro™ series accessory, or other running dynamics accessory that measures torso movement. For more information, go to


Sensor Type



Watch or compatible accessory

Cadence is the number of steps per minute. It displays the total steps (right and left combined).

Vertical oscillation

Watch or compatible accessory

Vertical oscillation is your bounce while running. It displays the vertical motion of your torso, measured in centimeters.

Ground contact time

Watch or compatible accessory

Ground contact time is the amount of time in each step that you spend on the ground while running. It is measured in milliseconds.
NOTE: Ground contact time and balance are not available while walking.

Ground contact time balance

Compatible accessory only

Ground contact time balance displays the left/right balance of your ground contact time while running. It displays a percentage. For example, 53.2 with an arrow pointing left or right.

Stride length

Watch or compatible accessory

Stride length is the length of your stride from one footfall to the next. It is measured in meters.

Vertical ratio

Watch or compatible accessory

Vertical ratio is the ratio of vertical oscillation to stride length. It displays a percentage. A lower number typically indicates better running form.

GUID-C001C335-A8EC-4A41-AB0E-BAC434259F92 v10
June 2024