Jack, I have to disagree about the wrist movement. If you twist the forearm, all of the action occurs at the elbow and the forearm itself rotates like a pipe. If the twist occurs at the wrist and the end point of the twist is pulled back to the elbow, the rotation occurs over the forearm with the max at the wrist and decreasing as it approaches the elbow. Doing it at the elbow makes the joint act like a ball and socket joint. This also holds for the foot. The only rotation for the forearm and the shin should be a bend.