Reset Fitness Calibration Data question for Apple Watch series 6

Hello Paul755,

That message means that after you reset the calibration data, your watch will initially have less accurate workout results until it is calibrated again. As you use an Apple Watch, it is constantly using measurements like your stride length, and heart rate to generate an average data point and use that to better estimate your activity. This is especially important for workouts where an actual distance (GPS) data point is not available, like walking on a treadmill for example.

After you reset the calibration data, you can recalibrate it right away with these steps:

1. While wearing your Apple Watch, go to a flat, open outdoor area that offers good GPS reception and clear skies.

2. If you have Apple Watch Series 2 or later, you just need your Apple Watch.* If you have Apple Watch Series 1 or earlier, bring your iPhone for GPS. Hold your iPhone in your hand, or wear it on an armband or waistband.

3. Open the Workout app, then tap Outdoor Walk or Outdoor Run. To set a goal before starting, tap .

4. Walk or run at your normal pace for about 20 minutes.

Calibrate your Apple Watch for improved Workout and Activity accuracy

Resetting the calibration data would have no effect on past data that has already been logged in the Activity app.

Cheers!