Garmin Forerunner 201

The Garmin Forerunner 201. (Tim Tomkinson)

The world’s first all-in-one GPS-enabled running watch, released in 2003 by Kansas navigation company Garmin. A major breakthrough in training technology, the watch calculated pace, speed, and distance in real time, paving the way for Fitbit, Strava, and other fitness-tracking companies.

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