How to disable Apple Watch Activity app segment notifications?

So frustrating. My wife and I love our outdoor walks and enjoy recording them in the Activity app. Nothing fancy, we usually start the the Outdoor walk activity, and end it when we get home. We get a notification each time we hit a mile. Pleasant and useful.

Today for some reason, we were BOTH boarded with segment notifications. We didn't ask for them. We don't want them. We don't understand why we're getting them. We can't figure out how to turn them off. So, we just stopped the activities and have stopped using the app.

I Googled how to get rid of them when I got home and the first two procedures described in the results did not work. So, I'm posting here. Of course, I've wasted a frustrating hour including the time it takes to sort out this post.

How do I get rid of these annoying things? Please don't turn on things if you aren't sure we want them.

[Re-Titled by Moderator]

Original Title: Apple Watch Activity SEGMENTS? Bombarding us.