Heart Rate Accessory Running Pace and Distance

The HRM‍-Fit™ and HRM-Pro™ series accessories calculate your running pace and distance based on your user profile and the motion measured by the sensor on every stride. The heart rate monitor provides running pace and distance when GPS is not available, such as during treadmill running. You can view your running pace and distance on your compatible Forerunner® watch when connected using ANT‍+® technology. You can also view it on compatible third-party training apps when connected using Bluetooth® technology.

The pace and distance accuracy improves with calibration.

Automatic calibration
The default setting for your watch is Auto Calibrate. The heart rate accessory calibrates each time you run outside with it connected to your compatible Forerunner watch.
NOTE: Automatic calibration does not work for indoor, trail, or ultra run activity profiles (Tips for Recording Running Pace and Distance).
Manual calibration

You can select Calibrate & Save after a treadmill run with your connected heart rate accessory (Calibrating the Treadmill Distance).

Tips for Recording Running Pace and Distance

  • Update your Forerunner watch software (Product Updates).
  • Complete several outdoor runs with GPS and your connected HRM‍-Fit or HRM-Pro series accessory. It's important that your outdoor range of paces matches your range of paces on the treadmill.
  • If your run includes sand or deep snow, go to the sensor settings, and turn off Auto Calibrate.
  • If you previously connected a compatible foot pod using ANT‍+ technology, set the foot pod status to Off, or remove it from the list of connected sensors.
  • Complete a treadmill run with manual calibration (Calibrating the Treadmill Distance).
  • If automatic and manual calibrations don't seem accurate, go to the sensor settings, and select HRM Pace & Distance > Reset Calibration Data.
    NOTE: You can try turning off Auto Calibrate, and then manually calibrate again (Calibrating the Treadmill Distance).
GUID-9D99A9D4-467A-4F1A-A0EA-023184FEA3DD v8
March 2024