User Manual

The Forerunner device starts broadcasting your heart rate
data, and appears.
NOTE: You can view only the heart rate page while
broadcasting heart rate data.
4
Pair your Forerunner device with your Garmin ANT+
compatible device.
NOTE: The pairing instructions differ for each Garmin
compatible device. See your owner's manual.
TIP: To stop broadcasting your heart rate data, select any
key, and select Yes.
Running Dynamics
You can use your compatible Forerunner device paired with the
HRM-Run
™
accessory or HRM-Tri accessory to provide real-
time feedback about your running form. If your Forerunner
device was packaged with the heart rate monitor, the devices
are already paired.
The heart rate monitor has an accelerometer in the module that
measures torso movement in order to calculate running metrics.
NOTE: The HRM-Run accessory and the HRM-Tri accessory
are compatible with several ANT+ fitness products and can
display heart rate data when paired. The running dynamics
features are available on only some Garmin devices.
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 for each step.
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 is 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.
Training with Running Dynamics
Before you can view running dynamics, you must put on the
HRM-Run accessory or HRM-Tri accessory and pair it with your
device (Pairing ANT+ Sensors, page 13).
If your Forerunner was packaged with the heart rate monitor, the
devices are already paired, and the Forerunner is set to display
running dynamics.
1
Select , and select a running activity profile.
2
Select .
3
Go for a run.
4
Scroll to the running dynamics screens to view your metrics.
5
If necessary, hold to edit how the running dynamics data
appears.
Color Gauges and Running Dynamics Data
The running dynamics screens display a color gauge for the primary metric. You can display cadence, vertical oscillation, ground
contact time, ground contact time balance, or vertical ratio as the primary metric. The color gauge shows you how your running
dynamics data compare to those of other runners. The color zones are based on percentiles.
Garmin has researched many runners of all different levels. The data values in the red or orange zones are typical for less
experienced or slower runners. The data values in the green, blue, or purple zones are typical for more experienced or faster
runners. More experienced runners tend to exhibit shorter ground contact times, lower vertical oscillation, lower vertical ratio, and
higher cadence than less experienced runners. However, taller runners typically have slightly slower cadences, longer strides, and
slightly higher vertical oscillation. Vertical ratio is your vertical oscillation divided by stride length. It is not correlated with height.
NOTE: The color gauge for ground contact time balance is different (Ground Contact Time Balance Data, page 5).
Go to www.garmin.com for more information on running dynamics. For additional theories and interpretations of running dynamics
data, you can search reputable running publications and websites.
Color Zone Percentile in Zone Cadence Range Vertical Oscillation Range Vertical Ratio Ground Contact Time Range
Purple >95 >183 spm <6.4 cm <6.1% <218 ms
Blue 70–95 174–183 spm 6.4–8.1 cm 6.1–7.4% 218–248 ms
Green 30–69 164–173 spm 8.2–9.7 cm 7.5–8.6% 249–277 ms
Orange 5–29 153–163 spm 9.8–11.5 cm 8.7–10.1% 278–308 ms
Red <5 <153 spm >11.5 cm >10.1% >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.
Heart Rate Features 5