It seems that in the world of 24/7 activity tracking, what's old is new again, as we see a resurgence in the availability of fitness bands that have no display and offer a distraction-free approach to measuring key health and wellness metrics. Polar has long set the standard for optical heart rate monitoring, and it brings its latest heart rate technology to a simple tracker with the new . Also: I swapped my Apple Watch Ultra for this big-screen Garmin that's easier to read Smart rings have dominated the distraction-free fitness sector for the past couple of years, and now we have major fitness brands offering alternatives to the Whoop band but without subscription fees.