TBF, Vegeta's inflated ego keeps him partially aloft.

I've noticed that a lot of mangakas have weird sense of measurements for their characters.
There is absolutely no way someone like Vegeta would only weigh 56 kg, that would be what's expected of a petite woman.of the same length.
Muscle is more dense than fat, Vegeta is ripped as fuck and should weigh something like 70-80kg at the very least, especially since he comes from a heavier world than Earth.