Chest/ Watch HRM VS HRM on Treadmill?

missyj1115

PLEASE HELP ME TO UNDERSTAND - I am confused on what one to believe... I have the sportline HRM where I put a watch on and the chest strap and it tells me my heart rate and the calories I burn. I bought this for when I do Zumba to get a more accurate calorie burn count but thought I would see if there was much of a difference on the treadmill. I was surprised to see at a incline of 2 going 4 mph the read outs were off by 100 calories with the treadmill showing more burned than the chest HRM. The Treadmill was also showing a Heart rate of about between 20-30 higher than the sportline HRM... Of course I would want to enter in the higher of the 2 but I want to make sure I am getting the most accurate information. Any help I can get on this issue would be greatly appreciated!!! Thank you my fitness pals :-)