“Bones grow according to the stresses and strains put upon them.”
This is significant. Bone density concentration can change within any particular bone. Deliberate, long term postural attention can change the shape of the bones. this is great news for those with mild scoliosis and spinal stenosis and children born with clubbed feet.
Exercise and other therapies that change angles of pull, static positions, and load demands change how a body is pressed upon by gravity.
Remembering that gravity is one of those things that puts stresses and strains on a body is helpful as well