Re: For Ted Ehara - Boundary of your aikido?
Spend the $30.00 on a 'tensegritoy'. Build one of the models. My favorite is the icosahedron (twenty sides) with six sticks all parallel. It looks, and kicks, like a soccer ball when done.
Point is - the 'compression' i'm speaking of is because the tendons/fascia, I'll use 'strings' pull in a balanced way Down the length of the bone. You can snap a pencil easily - can you crush it by pushing directly along it's line (compression)? Probably not.