Polar have announced two new workout trackers, the Vantage V ($500) and the cheaper Vantage M ($280) companion. The Polar Vantage multisport watches help you maximise your workout, they both feature the Training Load Pro system that melds cardiovascular, muscular and perceived loads into a single metric. They also offer a more accurate heart rate monitoring that uses multi-layer optical sensing, electrodes and accelerometers to get both faster and more accurate heartbeat readings. Both are water and swim-proof, and and should last for 40 hours of sports activity time. The more expensive Vantage V includes a new optical heart rate sensor that makes heart rate readings more accurate, and you´ll also get running power data.