i was literally just going to post this Q and then i saw yours...
I just bought a Polar FT7 HRM that you enter in your age, height, gender, weight, and then, using a chest strap, it estimates your calories burned based on HR. It was saying my HR was 110 while I was brushing my teeth (Which i thought was high), so I checked it against my digital blood pressure monitor and it was spot on for HR.
Treadmill today said 236cal burned (i put in my goal weight on the treadmill, which is 20lbs lighter, since I heard they overestimate so much), HRM said 425!!! Since I eat back my exercise calories on MyFitnessPal - this is pretty scary!
Not sure what to believe, but from what I've read, the HRM will be wayyyyy more accurate than a treadmill/elliptical machine. I hope more people answer this post so we can figure out what's going on!
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