See a quick video tutorial showing how this wonder-watch works.
That’s PR for personal record.
If Santa can cover the globe in a single night, the Garmin Forerunner 620 GPS watch ($400-450) can help you perform your best too. Available at Garry Gribble’s Running Sports, this gadget boasts a wonderment of features like a recovery advisor, race predictor and VO2 max estimate. The HRM-Run monitor even provides feedback on running form by showing your cadence, ground contact time and vertical oscillation, or degree of bounce.
The Garmin Forerunner 620 is like real-time coaching in a watch. Give it time, and you just might achieve your own PR.