I have a polar heart rate monitor i use when training and have my correct height and weight in it, how accurate are these at calculating calories burned? I'm guessing pretty accurate as it is based on your heart rate as opposed to just guessing!
I'm more trusting of my Polar HRM than I am of the CC numbers or the numbers on the cardio machines. Your HRM, if you put in the right figures, is giving you much more personalized information.
That being said, I have the opposite "issue" of lucidiva--my Polar usually gives me a number that's about 100 calories LOWER than, for instance, the elliptical for every 30 minutes I'm on it. But that explains a LOT for me--ever since I started going by my Polar's estimate of what I've burned rather than CC's, and adjusted my eating accordingly, I've started making more progress in my weight & fat loss.
Study 1 shows errors in heart rate measurements
Study 2 investigates energy expenditure with Polar S410
My Garmin, on the other hand, is just awful. I'll go on a 30 minute 3.4 mile run and it will tell me I burned 900 calories. I wish!
Ditto for my Polar CS300. My generally tracks dead on with the treadmill until I hit about the 30 minute mark. After that my polar shows more calories than the treadmill. For me on a 60 min cardio workout, my polar generally will show approx 1100 calories and the treadmill will show 700-800. I usually split the diff and record 900.
My wife has the Polar F6 and she is the opposite - it will record at less calories than the treadmill shows.
Great questions !