Zone 1 (55-65% of max heart rate): This is the "conversational pace" zone. You work at a light intensity, so you can easily chat without losing your breath. This pace is ideal for burning fat and is ...

Beats' Powerbeats Pro 2 are expected to launch any time now. As we reported last week, they've appeared in regulatory databases and it has been reported that Apple is arranging to show them to the ...