Comment by Mountain_Skies

It is my understanding that humans generally are limited to converting about 0.8% of the body fat into usable energy per day. If women generally have more body fat, then they would be able to yield more energy from it before hitting the 0.8% limit (which likely is spread out over the day especially in endurance events). Or there might even be some variance in that 0.8% limit, with women being able to convert a bit more per day than men. This would fly in the face of the conventional wisdom that women have a more difficult time losing weight than men. Certainly would be an interesting possibility to study.