On the other hand, Garmin has a myriad of watches. For Whoop-like insights, you’re looking at the Forerunner or Fenix brands. All share the same design language and are large and sporty.

And after spending months testing the Oura Ring and the Apple Watch for your Cosmo reading pleasure, I knew it was time to take things to the next level with a Very Serious Gadget—the WHOOP ...

If you’ve been looking for a top-shelf fitness tracker, one of the best brands in the business is Whoop. Having developed quite the reputation over the years, professional athletes and everyday ...