Road Demon said:
ice cold. NO you are wrong. Not an urban myth.
Growth takes place at the epiphyseal growth plate of long bones by a finely balanced cycle of cartilage growth, matrix formation and calcification of cartilage that acts as a scaffold for bone formation. This sequence of cellular events constitutes endochondral ossification. Another feature of bone growth is a process of modelling, where bone is being continuously resorbed and replaced by new bone. Modelling is most active during childhood and adolescence, and enables long bones to increase in diameter, to change shape and develop a marrow cavity.
That's great, but knowledge of histo 101 is not everything.
1) Cartilage is flexible and application of stress does not change its shape. After the stress it just springs back to normal form and keeps growing according to genetic program. That's the wonderful thing about collagen and RF.
2) In order to change the shape of the bone you would somehow need to alter the pattern of osteoblast activity. Having a large weight for less than 10 minutes per week will not affect it, because the cell activity is not changed.
3)NOTHING died in the epiphyseal growth plate. The osteoblasts are still there, the osteoclasts are still there. And all of the ECM is intact. The only thing that happened is a pressure stress, which will simply inhibit the osteoclasts hormonally and will make the bones stronger.
I don't know of any studies done on this topic with statistically significant numbers.
Let's consider an example in archaeology. 2 different cultures. The children of one culture spend a lot of time sitting in chairs. The children of the other sit on the floor.
If your theory is true, then there would be differences in pervic structure which is modified by the pressure applied to the sacrotuberus would change its shape. It's never observed.