Comment by EGreg

OK, so then, what does make people lose weight? And all those pounds come off? How do you help someone who is mildly obese go to having a bikini body?

I read you lose calories by breathing heavily, as the CO2 leaves your body, etc.

In my opinion, it's not about aerobics, but building muscle mass. Women who pack on muscle burn more calories at rest than women who don't. They may weigh the same but the fat is replaced by muscle. (Women need fat, though, so too much of this can be bad.)