Quote Originally Posted by Kraco
Yeah, unless he meant the mass would feel heavier because the air would be thinner high up in the sky, and thus the body and muscles couldn't work so effectively.
They made alot of emphasis about how much harder it is to move for a blue sea dweller in the white-white sea, and how creatures evolved in ways to minimize their density in order to move more freely in the sky. By Oda's own world-physics, that gold pillar should be like, twice as heavy as a normal gold pillar.

Also, in normal physics, I would assume the variation in gravity between the surface and the stratosphere should be less of an influence than the variation in air density.