The Forerunner 945 is Garmin’s top of the line running watch- fitness trackers that put an emphasis on running. The Forerunner 945 can track several different activities, but it’s really perfect for serious runners. The watch comes equipped with top of the line tech to track things such as heart rate, routes, elevation, oxygen saturation, and countless other metrics. It can also be easily connected with other third-party sensors if users wish to use them.