For those who want the most accurate readings during exercise, our testing still leads us to recommend the Garmin HRM-Pro Plus chest strap ... such as the Garmin Fenix 8, and the Whoop 4.0 ...

It’s easy to think of a smartwatch battle being held exclusively between pedigree technology firms like Apple, Huawei, Fitbit and Samsung. But there is another way, with Garmin also producing a ...