Does crossfit belong in the activities section?

I do crossfit for fun. So no leadership roles, no recognition or accomplishment, just something I do. And it hasn’t been mentioned anywhere in my essays or anything, but I really enjoy it so I want to put it on my application somewhere. Should it go in the activities section or the additional info section?

It would go under activities. Additional info should only be used for important details that cannot be made to fit in any other section of the application.