Apple Watch Lost Activity Data

Try this:

Force restart your iPhone by what ever method your version calls for. As soon as you see the Apple logo force restart your watch by holding in the crown and side button for 10 seconds till you see the Apple logo then release. Log into your iPhone and wait for your watch to boot, then log into it.

I had a similar issue. After updating my Apple Watch to watchOS 7 and my iPhone to iOS 14 last Friday, I went out for a walk on Sunday, recording the walk on my watch. When I checked the Activity app on my phone, there was no workout recorded. I then went out for a run yesterday morning, again recording the workout on the watch, which I then sync with Strava. I’ve been doing this for years with no issues yet on synching this time, there was no location data recorded so I couldn’t see my route map and it only recorded a partial distance. I went out for another walk last night, again recording it on my watch but no workout was recorded in the Activity app. The funny thing is, for both walks it looks like the steps and distance were recorded, it just didn’t record the workout event, and for the run the watch recorded the full distance, but no location info and only synched part of it to Strava.

Hey NDPenny,

It sounds like you're having trouble with Activity data on your Apple Watch.

For this issue, please reach out to Apple Support for assistance: Get Support.

Have a great day.