Power is the optimum metric used by professional cyclists to monitor their performancerecently featured in the rcuk 100quotgarmins original vectors brought pedal based power measurement to the forefront sure look and polar had combined to do it first but garmin did it betterquot read moreunaffected by weather conditions or your position only training to power ensures truly objective analysis of your training progresswith vector 2s garmin have made power available in a package that is q