Vertical Oscillation And Vertical Ratio Data; Tips For Missing Running Dynamics Data; Chest Heart Rate While Swimming; Using An Optional Bike Speed Or Cadence Sensor - Garmin FORERUNNER 255 Series Owner's Manual

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, HRM-Run
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-Pro accessory.
Accessories with running dynamics have
• Pair the running dynamics accessory with your watch again, according to the instructions.
• If you are using the HRM-Pro accessory, pair it with your watch 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.

Chest Heart Rate While Swimming

The HRM-Pro, HRM-Swim, and HRM-Tri heart rate accessories record and store your heart rate data while you
are swimming. To view your heart rate data, you can add heart rate data fields
page 81).
NOTE: Chest heart rate data is not visible on compatible watches while the heart rate monitor is underwater.
You must start a timed activity on your paired watch to view stored heart rate data later. During rest intervals
when out of the water, the heart rate accessory sends your heart rate data to your watch. Your watch
automatically downloads stored heart rate data when you save your timed swim activity. Your heart rate
accessory must be out of the water, active, and within range of the watch (3 m) while data downloads. Your
heart rate data can be reviewed in the watch history and on your Garmin Connect account.
If both wrist-based heart rate and chest heart rate data are available, your watch uses the chest heart rate data.

Using an Optional Bike Speed or Cadence Sensor

You can use a compatible bike speed or cadence sensor to send data to your watch.
• Pair the sensor with your watch
• Set your wheel size (Wheel Size and Circumference, page
• Go for a ride (Starting an Activity, page
Sensors and Accessories
, 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.
(Pairing Your Wireless Sensors, page
3).
Vertical Ratio at
Chest
<6.1%
6.1–7.4%
7.5–8.6%
8.7–10.1%
>10.1%
(Customizing the Data Screens,
60).
108).
Vertical Ratio at
Waist
<6.5%
6.5–8.3%
8.4–10.0%
10.1–11.9%
>11.9%
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