"Although I think that online calculators in general can be a bit distorted for cycling for heavier people, as you are really working against the rolling resistance of the bike and wind resistance, rather than your body weight as you might for walking and running."
Anecdotally speaking I would think that cycling would be far *more* taxing at a higher weight than is walking, though maybe not running, provided there are hills. (On the flat the whole time, probably not.) There were some hills in my area that I could just flat not get up at all when I weighed 180 pounds or more, that are relatively simple at 145. And that's not all just fitness, since I attempted them a few times at 180+ after I had been working out for a few monhs. Both my lungs and my legs just flat-out failed and could not handle it. Now I can. I've never experienced anything like that sharp division between "can" and "can't" (related to weight) anywhere I've ever walked or hiked.
There's also the evidence that pro road cyclists drop weight worse than wrestlers the day before a weigh-in, when it's race time.
But all that said (and I'm just quibbling) SP's calorie burn does seem really high for cycling.
Height 5'8 1/2"
GW: Originally 150. Maintaining at about 146 since June 2013.
5K 4/21/11: 31:55
|39 Maintenance Weeks