Ground Contact Time Balance Data; Vertical Oscillation And Vertical Ratio Data; Tips For Missing Running Dynamics Data - Garmin DESCENT MK1 Owner's Manual

Ground Contact Time Balance Data

Ground contact time balance measures your running symmetry and appears as a percentage of your total
ground contact time. For example, 51.3% with an arrow pointing left indicates the runner is spending more time
on the ground when on the left foot. If your data screen displays both numbers, for example 48–52, 48% is the
left foot and 52% is the right foot.
Color Zone
Symmetry
Percent of Other Runners
Ground Contact Time Balance
While developing and testing running dynamics, the Garmin team found correlations between injuries and
greater imbalances with certain runners. For many runners, ground contact time balance tends to deviate
further from 50–50 when running up or down hills. Most running coaches agree that a symmetrical running
form is good. Elite runners tend to have quick and balanced strides.
You can watch the color gauge or data field during your run or view the summary on your Garmin Connect
account after your run. As with the other running dynamics data, ground contact time balance is a quantitative
measurement to help you learn about your running form.

Vertical Oscillation and Vertical Ratio Data

The data ranges for vertical oscillation and vertical ratio are slightly different depending on the sensor and
whether it is positioned at the chest (HRM-Pro
Dynamics Pod accessory).
Percentile in
Color Zone
Zone
Purple >95
70–95
Blue
30–69
Green
Orange 5–29
<5
Red

Tips for Missing Running Dynamics Data

If running dynamics data does not appear, you can try these tips.
• Make sure you have a running dynamics accessory, such as the HRM-Run accessory.
Accessories with running dynamics have
• Pair the running dynamics accessory with your Descent device again, according to the instructions.
• If you are using the HRM-Pro accessory, pair it with your Descent device using ANT+ technology, rather than
Bluetooth technology.
• If the running dynamics data display shows only zeros, make sure the accessory is worn right-side up.
NOTE: Ground contact time and balance appears only while running. It is not calculated while walking.
Heart Rate Features
Red Orange
Poor Fair
5% 25%
>52.2% L 50.8–52.2% L 50.7% L–50.7% R 50.8–52.2% R >52.2% R
, HRM-Run, or HRM-Tri accessories) or at the waist (Running
™
Vertical Oscillation Vertical Oscillation
Range at Chest Range at Waist
<6.4 cm <6.8 cm
6.4–8.1 cm 6.8–8.9 cm
8.2–9.7 cm 9.0–10.9 cm
9.8–11.5 cm 11.0–13.0 cm
>11.5 cm >13.0 cm
on the front of the module.
Green
Good Fair
40% 25%
Vertical Ratio
at Chest
<6.1%
6.1–7.4%
7.5–8.6%
8.7–10.1%
>10.1%
Orange Red
Poor
5%
Vertical Ratio
at Waist
<6.5%
6.5–8.3%
8.4–10.0%
10.1–11.9%
>11.9%
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