[lawn]

I agree.

And for those who recommend a Garmin, an Oura ring or similar:

I have a Garmin and it's great but I cannot wear it during martial arts (grappling).

I also can't wear a ring doing weight lifting or when I'm grappling.

I had a Whoop and it was really good for tracking martial arts (the boxers with the holder was super comfortable) but alas it was expensive and the sleep tracking with it in the boxers was really poor.