


It does this by comparing data from the accelerometer with GPS / Location Services data. However, it may help to recalibrate your Apple Watch, resetting your existing calibration data and starting afresh by recording some Outdoor Walk workouts in areas with flat ground, clear skies and good GPS reception (this process can be equally helpful for Series 3 models as for Series 1 and earlier):Ĭalibrating your Apple Watch for improved Workout and Activity accuracy - Apple SupportĬalibration teaches your Apple Watch how your arm movements relate to your stride lengths at different speeds when you are walking and/or running. It is not possible to calibrate the GPS on your Apple Watch.
