GPS running watches represent a step up from fitness trackers: In addition to step counts and distance measurements, GPS watches offer a slew of advanced training metrics.Since 2014, we’ve put 43 watches through the paces by taking hundreds of heart-rate readings and wearing the watches for long and short runs on trails and on tracks (as well as in races).We’ve found that the Coros Pace 4 — with its speedy GPS acquisition and excellent battery life — is the best choice for most runners.If you want more smartwatch-like features than the Pace 4 provides, we’ve found that the Garmin Forerunner 165 and Garmin Forerunner 165 Music offer the best overall value in the Garmin lineup.