With marathon season in full swing, Whoop’s screen-free wearable could help you train smarter The much-anticipated Whoop 5.0 and Whoop MG launched last year. And while both bands still occupy their own unusual corner of the wearable world, eschewing screens in favour of a distraction-free band, a slew of impressive new features have cemented their place among the best fitness trackers on the market, particularly when it comes to making sense of performance metrics like VO2 max, which measures