This article is part of Kotaku Deals, produced separately from the editorial team. We may earn a commission when you buy through links on the site. The way all athletes improve is with data. If you ...

For pacing, navigation, fitness stats and so much more, a GPS smartwatch is an essential accessory for every runner – and we’ve tested them to the max. From Garmin, Polar, Suunto and Coros, here are ...