Arm speed

javasource said:

Contracting muscles create an eccentric force (not the same as eccentric contraction) to bone that it is attached to... which causes the bone to rotate about an axis at the joint. The length of the force arm and the amount of force determine the torque. If you look at the last 1/4 of the circle... which is what I was writing about... the extension that occurs in the elbow - as we head into release, is due in part to a contraction of the triceps. When the triceps contracts, the force it produces creates torque at the ELBOW JOINT... which, believe it or not... creates an extension at the elbow joint... which is one of the reasons the tricep is known as an extensor. There is also a large amount of torque applied to the posterior shoulder areas DURING internal rotation... that act in an attempt to stabilize the musculature... so that the arm can continue to efficiently move along it's path... AS WELL AS provide deceleration mechanisms... which are required of the upper arm in order to accelerate the lower arm. This piece would tie nicely into your most recent thread.

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FiveFrameSwing said:

To a considerable extent, much of this applies to a swing as well.

Curious ... in your opinion, wouldn't this description also describe what was earlier referred to as "forearm fire"?

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