got a very on sale garmin vivosmart 4 ( old kinda shitty garmin fitness tracker ) 'cause it's fucking tiny and wasn't a huuuuuge commitment
and like unlike some of the newer things it's not at all good at actually identifying sleep phases all that accurately
but ha ha wow the degree to which resting heart rate is a correlate of restedness is still wild lmao this is just goofy .......
also tho it sure does keep yelling at me for not sleeping worth shit i'm TRYING but it's HARD