To over-simplify, I think women focus more on the psychological and men focus more on the physical. Women will support the improvement of the mind, while men will support the improvement of the body. A century ago this would be perfect, as the two factors would be relatively balanced; a good portion of the women who felt fat were probably a perfect weight. But nowadays the body needs a lot more improvement than the mind, and the psychological support can be counter-productive. As I said, this oversimplifies everything, and is a crude assignment of gender roles. But the mind vs body focus can be a useful way to examine it.