Polar's latest watches know if you're maximizing your workouts
 

Polar has a way to compete against ever more fitness-savvy smartwatches: offer exercise tracking that's difficult to match. It's launching two fitness watches, the Vantage V (above) and Vantage M (below), that promise more insights for particularly...

https://www.engadget.com/2018/09/13/...age-m-watches/