FWIW, I'm male, 33 years old, 207lbs, 6' tall
I rode for 97 minutes today, averaging almost 16mph with a few hills and some wind. Avg heart rate was 150.
myfitnesspal said I burned 1517 calories.
Garmin said I burned 1177 calories
Strava said I burned 774
Strava was still probably a tad high but at least it seems to estimate much more on the conservative side of things.
__________________
Hey guys, lets go play bikes!
Strava