Tucking Your Stomach In For A Whole Day Will Train Your Stomach To Stay That Way by Aimee Kavanagh Tucking Your Stomach In For A Whole Day Will Train Your Stomach To Stay That Way A friend of mine told me this so I thought, "it couldn't hurt to try", after doing it for that one day I saw a difference, it wasn't a big difference but it didn't matter, as long as it was working, so I continued this for a while and I don't exercise or diet at all and I eat a lot, like a lot a lot, and I wasn't blessed with a fast metabolism like most girls, but this too really helped me, as you can see.