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Running Power
Garmin running power is calculated using measured running dynamics information, user mass, environmental
data, and other sensor data. The power measurement estimates the amount of power a runner applies to the
road surface, and it is displayed in watts. Using running power as a gauge of effort may suit some runners
better than using either pace or heart rate. Running power can be more responsive than heart rate for indicating
the level of effort, and it can account for the uphills, downhills, and wind, which a pace measurement does not
do. For more information, go to www.garmin.com/performance-data/running/.
Running power can be measured using a compatible running dynamics accessory or the watch sensors. You
can customize the running power data fields to view your power output and make adjustments to your training
(Data Fields, page97). You can set up power alerts to be notified when you reach a specified power zone
(Activity Alerts, page82).
Running power zones are similar to cycling power zones. The values for the zones are default values based on
gender, weight, and average ability, and may not match your personal abilities. You can manually adjust your
zones on the watch or using your Garmin Connect account (Setting Your Power Zones, page66).
Running Power Settings
Hold UP, select Activities & Apps, select a running activity, and select the activity settings.
Status: Enables or disables recording Garmin running power data. You can use this setting if you prefer to use
third-party running power data.
Source: Allows you to select which device to use to record running power data. The Smart Mode option
automatically detects and uses the running dynamics accessory, when available. The watch uses wrist-based
running power data when an accessory is not connected.
Account for Wind: Enables or disables using wind data when calculating your running power. Wind data is a
combination of the speed, heading, and barometer data from your watch and the available wind data from
your phone.
Running Dynamics
You can use your compatible Forerunner device paired with the HRM-Pro accessory or other running dynamics
accessory to provide real-time feedback about your running form.
The running dynamics accessory has an accelerometer that measures torso movement in order to calculate six
running metrics. For more information, go to www.garmin.com/performance-data/running/.
Cadence: Cadence is the number of steps per minute. It displays the total steps (right and left combined).
Vertical oscillation: Vertical oscillation is your bounce while running. It displays the vertical motion of your
torso, measured in centimeters.
Ground contact time: 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: 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: Stride length is the length of your stride from one footfall to the next. It is measured in meters.
Vertical ratio: Vertical ratio is the ratio of vertical oscillation to stride length. It displays a percentage. A lower
number typically indicates better running form.
58 Sensors and Accessories
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