The Stryd ecosystem will calculate and update your Critical Power and your Power Zone information on a daily basis. The updated information should automatically transfer to your Garmin watch if you have the Stryd Zones data field installed on your watch.
We sometimes see that Garmin is not grabbing the critical power and power zone information from our servers. If that happens to you, open up Garmin Connect on your phone and make sure it can find your Garmin. Then, keep Garmin Connect open and on top of your phone and avoid that the screen of the phone switches off (keep the phone active). Do this for a maximum of 30 minutes, the watch will get the correct information from our servers.