Garmin Premium HRM-Run Cadence: number of steps per minute Vertical oscillation: degree of 'bounce' in your running motion displays the vertical motion of your torso, measured in centimeters for each step. Ground contact time: amount of time in each step that you spend on the ground while running measured in milliseconds Ground contact time balance: displays the left/right balance of your ground contact time while running (displays a percentage) for example, 53.2 with an arrow pointing left or right Stride length: length of your stride from 1 footfall to the next measured in meters Vertical ratio: ratio of vertical oscillation to stride length (displays in percentage) a lower number typically indicates better running form