Q: Can I sync health activity between two Apple Watches?

No. It's not possible to sync health activity between two Apple Watches.

Hi

Your Activity progress - including from any workouts - should sync automatically after you switch between watches.

Check that you have paired them and are switching between them in accordance with the instructions in the following support article, including the related advice under the heading "Get help":

Use more than one Apple Watch with your iPhone - Apple Support

The following steps may help:

• Close all open apps on your iPhone and then restart your iPhone and each watch:
  • On your iPhone: double-click the Home button, then swipe up on each app preview to close it;
  • Turn all devices off, then restart your iPhone first;
    • Restart your iPhone, iPad, or iPod touch - Apple Support
    • Restart your Apple Watch - Apple Support

• Update to the latest software (iOS 10 and watchOS 3 are due for release on 13 September):
  • Update the iOS software on your iPhone, iPad, or iPod touch - Apple Support
  • Update the software on your Apple Watch - Apple Support

• Unpair and re-pair your watches:
  • Unpair your Apple Watch and iPhone - Apple Support
  • Set up your Apple Watch - Apple Support

If the issue then persists, I suggest that you contact Apple Support or make a Genius Bar reservation for assistance:

• Contact - Official Apple Support
• https://twitter.com/applesupport
• http://www.apple.com/retail/geniusbar/

If it's any consolation, it's not working on my watches either. Very frustrating when you've tried everything in the support article.

I have sent feedback to Apple.

You can if you like > http://www.apple.com/feedback/watch.html

You're welcome

Hi

Wait for ios 3 update later today .

Cheers

Brian