i am wondering how other track their calorie consumption for thier workouts. i have a stationary bike that meaures resistence/speed/etc, but not heart rate and for an hour it usually says 375 cal, but if i were to plug in the same metrics into mapmyride.com it says 420 cal consumed.

in addition to that, just got a new cyclocomputer with a HRM, cateye v3, and yesterday it says 543 cal consumed. albeit yesterdays training ride was more intense than the other two days, this is a large window of potential consumption. and for me, who is trying to gain wieght (yes, you read that right, gain, though mostly muscle) i need a realtively accurate measure of cal consumed so i can be sure to overeat the desired amount each day.