Polar's Vantage V3 fitness watch is a big upgrade that costs $600

It's taken three years, but Polar is finally ready with a new iteration of the Vantage watch: the Polar Vantage 3. The V3 can track more than 150 sports. That includes tools that cater to more serious athletes, and not just the run of the mill consumer, like triathlon training. There are also unique metrics like Training Load Pro, which tells you how much strain you place on both your cardiovascular and musculoskeletal system during your workouts. There is also Wrist-Based Running Power, which c...