Now you can combine the benefits of training with heart rate and power. Power data is one of the most important pieces of cycling performance data. With the power option for the Polar S625X, S725, S720i, and S710 - your power data will be downloaded from your HRM along with your heart rate data. This allows you to visualize the relationship between your heart rate and power. The power option also measures your left and right pedaling ratio and overall efficiency. Best of all, there are no wheel or hub changes needed, and the unit weighs just 225 grams.
