Peter Attia· MD
so you look at the neck very thin uh uh small diameter vertebra it's made for bending and Mobility fabulous but as you move down the spine and get to the bottom two where the thickest is they do not tolerate bending near as much as they tolerate compression so there's the first um uh anatomic feature that describes why the bending stresses are greatest at the thicker Two Joints which are uh at the bottom