TIL that a 2017 study about fitness trackers found higher rates of error when the trackers were used by people with darker skin tones. User BetterBeRavenclaw, in the Today I Learned (TIL) subreddit, 09 May 2020
Accuracy in Wrist-Worn fitness trackers for heart rate and energy expenditures from Stanford User forefatherrabbi, in the DataIsBeautiful subreddit, 25 May 2017
Watch is the most accurate wrist-worn fitness tracker, according to recent study [x-post /r/applewatch] User dodekerekt, in the Circlejerk Different subreddit, 24 May 2017
Apple Watch most accurate wrist-worn fitness tracker in new study of heart rate and energy expenditure User acparks1, in the r/Apple: Unofficial Apple Community subreddit, 24 May 2017