Originally Posted by MetalPedaler

Problem there, Bubba; the participants are not necessarily p[utting out the same amounts of power; nor achieving the same performance.

Naturally, it's going to take less energy for 125lb person to pedal that 125 lbs. up a hill, or to propel himself at 20MPH, than for a 200 lb. person to do the same.[/QUOTE]

So isn't that saying the heavier person has to expend more energy or power for the same work, climbing or speed?
If we research the whole study it listed calories burned by speed as well. Do you have a study we can read that states differently? The Harvard Study is used by a lot of fitness people including LivesStrong. Indicating that a heavier person has to work harder and thus does more work to get the same results as a lighter one. Pro bike racers have demonstrated this using power meters on lightweight climbing specialists and heavier sprinters. That is only one way to measure things I guess. when it is done by people trained to measure such things rather that by seat of the pants dynometers. You said, "Yesterday, I did my fastest/best ride ever. You are 100% correct...I definitely burned more calories than when I was 40 lbs. heavier and putzing along at 12MPH and stopping halfway up every hill!" All I said was how can you prove it? Harvard would say to burn the same calories cycling you have to work harder or longer. Are you saying Harvard medical is wrong? Or is this like your estimated 170 percent of your Maximum oxygen uptake? Oh and our saying wouldn't be Bubba, it would be Dude.