External rotation in pitching (link)

There’s an interesting conversation taking place on the ASMI message boards regarding ER/MER in the pitching delivery, if anyone wants to check it out:

I’ve been reading it in real time, very interesting thread.
Worth the read just to understand some of the forces involved in throwing

Been following it too. Was wondering why someone would want to try to increase MER. It’s like increasing stride length - do the things that result in a long stride and let stride length happen. So, do the things that result in increased MER and let MER happen.

very interesting, some of it goes above me a bit