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Color Zone Percentile in Zone Cadence Range Ground Contact Time Range
Purple >95 >183 spm <218 ms
Blue 70–95 174–183 spm 218–248 ms
Green 30–69 164–173 spm 249–277 ms
Orange 5–29 153–163 spm 278–308 ms
Red <5 <153 spm >308 ms
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 Red Orange Green Orange Red
Symmetry Poor Fair Good Fair Poor
Percent of Other Runners 5% 25% 40% 25% 5%
Ground Contact Time Balance >52.2% L 50.8–52.2% L 50.7% L–50.7% R 50.8–52.2% R >52.2% R
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-Tri or HRM-Run
™
accessories) or at the waist (Running Dynamics Pod accessory).
Color Zone Percentile in Zone Vertical Oscillation Range at
Chest
Vertical Oscillation Range at
Waist
Vertical Ratio at Chest Vertical Ratio at Waist
Purple >95 <6.4 cm <6.8 cm <6.1% <6.5%
Blue 70–95 6.4–8.1 cm 6.8–8.9 cm 6.1–7.4% 6.5–8.3%
Green 30–69 8.2–9.7 cm 9.0–10.9 cm 7.5–8.6% 8.4–10.0%
Orange 5–29 9.8–11.5 cm 11.0–13.0 cm 8.7–10.1% 10.1–11.9%
Red <5 >11.5 cm >13.0 cm >10.1% >11.9%
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-Tri accessory.
Accessories with running dynamics have on the front of the
module.
• Pair the running dynamics accessory with your tactix device
again, according to the instructions.
• 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.
Performance Measurements
These performance measurements are estimates that can help
you track and understand your training activities and race
performances. The measurements require a few activities using
wrist-based heart rate or a compatible chest heart rate monitor.
Cycling performance measurements require a heart rate monitor
and a power meter.
These estimates are provided and supported by Firstbeat. For
more information, go to garmin.com/performance-data/running.
NOTE: The estimates may seem inaccurate at first. The device
requires you to complete a few activities to learn about your
performance.
VO2 max.: VO2 max. is the maximum volume of oxygen (in
milliliters) you can consume per minute per kilogram of body
weight at your maximum performance.
Predicted race times: Your device uses the VO2 max. estimate
and your training history to provide a target race time based
on your current state of fitness.
HRV stress test: The heart rate variability (HRV) stress test
requires a Garmin chest heart rate monitor. The device
records your heart rate variability while standing still for 3
minutes. It provides your overall stress level. The scale is 1 to
100, and a lower score indicates a lower stress level.
Performance condition: Your performance condition is a real-
time assessment after 6 to 20 minutes of activity. It can be
added as a data field so you can view your performance
condition during the rest of your activity. It compares your
real-time condition to your average fitness level.
Functional threshold power (FTP): The device uses your user
profile information from the initial setup to estimate your FTP.
For a more accurate rating, you can conduct a guided test.
Lactate threshold: Lactate threshold requires a chest heart rate
monitor. Lactate threshold is the point where your muscles
start to rapidly fatigue. Your device measures your lactate
threshold level using heart rate data and pace.
Turning Off Performance Notifications
Some performance notifications appear upon completion of your
activity. Some performance notifications appear during an
activity or when you achieve a new performance measurement,
such as a new VO2 max. estimate. You can turn off the
performance condition feature to avoid some of these
notifications.
1
Hold MENU.
2
Select Physiological Metrics > Perf. Condition.
18 Heart Rate Features
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