Hmmm . . . CR400 . . . true to an extent, but she's going to have to fuel/refuel herself properly in order to build that muscle and endurance necessary to support her cycling! And, who knows, maybe she does (we don't know the particulars about this "Top Model" - whether she is "naturally" thin or starves herself or whatnot). I'm just pointing out that in order to really succeed at this sport, it is largely dependant on how well one cares for oneself (food, water, rest, etc.) in addition to training. Big, small, doesn't matter if you're not caring for yourself in a healthful manner. The big (heavier) guys were blowing me away this past Saturday 'cause I didn't hydrate/fuel properly . . .