I have a question, how accurate do you think your hrm is? I have the polar f4, for women and I like it. I'm just wondering if my calorie burn is accurate. I only ask because this morning I did 55mins of Lomax and burned 630 calories and then after my stretch I was up to 700 calories. Do you think this is accurate? How much margin for error is there?
Jenn
Jenn