Having trouble with my Stand activity on watch

Hi,

Check this page regarding Apple Watch accuracy: https://support.apple.com/en-gb/HT207941

Also:

Make sure that Wrist Detection is on

If Wrist Detection is off, you won't get Stand notifications, and your Apple Watch can't track your Stand progress. Background heart rate readings (like resting and walking rates) won't be taken if Wrist Detection is off. 

To check the setting, open the Apple Watch app on your iPhone. Tap the My Watch tab, then tap Passcode. Make sure that Wrist Detection is on.

Remember that standing goals rely on the user moving about for a minute or so each hour. This means that it will only update each hour, if you’ve stood up and moved a bit since the last check.

Hope this helps,

Vicko