How to keep privacy when using a fitness tracker

Ive been doing a lot of research on the many types and brands or fitness trackers and trying to find the most privacy respecting options and some opinions from people here about this topic

Possible choices:

Smart watches, google, apple, Samsung ect

Cheap smart watches amazfit 7, mi band 7

Fitbit inspire 3

Rings like orua, ultrahuman, ringconn

Out of these options only ones that i would use is the cheap amazon bands and Mi bands that can be used …

apple doing find fitbit fitness google lot opinions options people privacy research samsung smart smart watches topic tracker trackers types watches