The calculation is obviously clueless as to wind-resistance and up/down hills, which will skew the results. According to my low-budget cycling computer which judges calories burned based on age, velocity, time, and weight that trip burned ~3300 kcal (it also suggests 0.85 lbs of fat burned, but obviously not every calorie burned came from fat). I don't know what a power meter is, but the last time I rode 2.5 hours I covered 58 km. What I do know is that by using this method I was able to drop a consistent 5 lbs a month over 6 months. And over the course of several weeks these things probably equal out. I know that what I enter for calories burned may not be 100% accurate, but then I doubt that my calories eaten are 100% accurate either. So if the HRM says I burned 650 cals, I'll enter 550. Also, at the end of a ride or other activity I round down the calories burned when entering them into FitDay. What I've ended up doing is to set my weight in the HRM about 5 lbs below what my actual weight is. ![]() Heart rate can be used for a reasonable estimation of calories and then the HRM uses algorithms to including the heart rate, user's weight and age to calculate the calories burned.) ![]() (In general this has to do with using the heart rate to calculate calories is not a direct equation. From reading through various sources - some scientific and some anecdotal, I came to the opinion that the calorie counter of the Polar is slightly optimistic. I first starting using a Polar HRM just over a year ago.
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