I’d rather not wear anything on my wrists but I like data so wear an Apple watch 7 to collect health data. I use Health Auto Export app on iOS to sync health data to homeassistant. I found straightforward guide to set it up but it is not perfect, need to open the app regularly for the data sync to happen. Battery life sucks, for my usage max it’ll last is a little over 2 days. Quick charging works well enough so usually only gotta charge for a few mins once a day.