Garmin Forerunner 101 Wrist-Mounted GPS Personal Training Device The Garmin Forerunner 101 is an incredible fitness tool that uses Global Positioning Technology (GPS) to precisely calculate your distance, speed, calorie burn - even altitude. In fact, its calorie burn even takes into account uphills and downhills you may have encountered. Another unique design feature of the Forerunner 101 is the ability to store lap histories for up to two years. If you like to explore new routes or travel a lot, the Garmin Forerunner 101 allow you to mark specific locations, see their current position on the plotter display, and follow an electronic breadcrumb trail back to your starting point. Working out with the Forerunner 101 means you’re never alone in your personal training, because the unit provides a “Virtual Partner”. You’ll get a graphic perspective of your performance by viewing your pace in relation to your Virtual Partner’s pace, so you can always see at a glance if you’re keeping up or falling behind.