The coldest burst of Arctic air this season is coming to put an icy exclamation point on America's winter of repeated polar vortex invasions, meteorologists warn. And it will stay frozen there all ...

If you don’t have a compatible Polar watch, you can use Polar H10 to track your heart rate in the pool and move your heart rate data to the free Polar Beat app afterwards.

It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it and how does it impact our weather? The polar vortex is ...