i just got my polar F6 in the mail a few days ago. I used it at the gym ?

jenn29ky · Yahoo User

the machine i was on had a different amount of calories burned than my heart rate monitor its a watch and chest strap combo (coded) so witch one was right my heart rate monitor didn't know what kind of machine i was using and i thought that different kinds of exercises burn different calories but the machine knows what I'm doing.