Applewatch fitness removes friends. The other party doesn't send you a message, he doesn't know. This is one-way.

Removal steps:

1. Open the fitness record application on iPhone.

2. Click on the * * * Enjoy tab, and then click on your friends.

3. Click "Delete Friends". After deleting friends, neither you nor the other person can see each other's fitness records. To start enjoying again, please send a new invitation to your friends.