When exercising he wears a Polar heart rate monitor which sends data from a chest strap to his wristwatch. But his exercise bike also has a heart rate readout that depends on your hands touching ...

SEE ALSO: 10 of the best fitness trackers for monitoring heart ... the other trackers that were bulky and less flush to my chest. The strap itself continues to be super durable without any wear ...

Bad news for folks hoping the Powerbeats Pro 2 can replace their chest strap at the gym ... Rainmaker, who’s trusted by fitness enthusiasts for his rigorous heart rate and GPS testing, says ...