Garmin Forerunner 910XT

A combined heart-rate monitor and GPS unit will supercharge your training. These are the best on the market.

Garmin 910XT

It won’t win any design awards, but with the ability to toggle between vital stats for running, biking, and swimming with the push of a button, it’s the ideal tool for serious multisporters. The 910XT also has the best swim-tracking capabilities: it distinguishes between strokes and can calculate your swolf score, a measure of the number of strokes and the amount of time it takes to cover a certain distance. The device comes with a hefty price tag, but its simple syncing software and large display make parsing exercise data as easy on the road as it is in front of a computer. Plus, the 910XT is compatible with virtually every ANT+ sensor.

Brand: Garmin $450