Why some big mom daily square dance, but still not thin down?

Dancing is also a kind of exercise, as long as the movement, to a certain extent, can lose weight, it is reasonable to say that every day called the body should be very good, the first square dance aunt did not lose weight, because the dinner ate a lot of exercise time is short because due to be too busy busy housework so there is no time to do sports, only after dinner can do sports.