Reply #22: Not being able to make it up the stairs has nothing to do with being fat

[eridani]

It has to do with being out of shape. If fat people climb stairs often enough, they'll get better at doing it, even with little or no weight loss. There is no reason whatsoever to assume that healthier lifestyles will make fat people thin. Probably result in weighing less, but that isn't the same as thin.