Paring new Apple Watch

[foxkoneko]

How do you go about pairing a new apple watch with your iPhone & keeping the old data from the old apple watch (like activity data)?
Assuming it just should be saved to the phone but want to make sure

 

[The Tuck]

Yep, the iPhone stores a backup, so when you set up a new Watch, it gives you the offer to restore from a backup.

But in the case of activity and workout tracking, those are actually stored on the iPhone in the Activity and Health apps.

Tuck