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McGill advocates for quadratus lumborum training via the isometric side bridge exercise. He has presented evidence that the isometric side bridge trains MF, TVA and QL in one exercise. He also maintains that the medial fibers of the QL function as stabilizers and the lateral fibers function as prime movers. His painstaking research is compelling (he's done many studies involving intradiscal pressure with different lumbar exercises as well as EMG studies with different exercises). Mel, Please let us know how the visit goes. I'd be very interested in learning about his views, thoughts, research, etc...any insight you would pass along would be much appreciated. Jason ----- Original Message ----- From: [log in to unmask] To: [log in to unmask] Sent: Friday, December 13, 2002 7:31 AM Subject: Pilates Core Training Myths? < I was referring to past discussions (which ended up with people getting into heated debates) about TVA in which you were, in effect, refuting the role of the TVA, its dysfunction and isolated training. I was ribbing you in a good natured way because of your use of the TVA in order to kick Pilates around some more. In other words, you were arguing both sides of the coin and I was kidding you about it. >> *** I know! Anyway, I don't bother to pay any special attention to my TvA, since my neural computer seems to have served me well for many decades of participation in life and very strenuous Olympic weightlifting and martial arts. Whether or not my TvA or any other individual muscle has been playing some sort of superordinate role I do not really know, but whatever my computer has done it seems to have recruited some quite appropriate muscles to make my daily and sporting life a real pleasure, despite the apparent risks of training most days with very heavy loading. I often argue several sides to any given debate - that helps to clear out many of the cobwebs of bias and belief. Moreover, it iterates the admonition expressed by the ending of a book that I always suggested that my students read, namely"Illusions" (Adventures of a Reluctant Messiah) by Richard Bach - the ending said "Everything in this book may be wrong". Anyway, this weekend our home in Denver will be filled with some interesting times discussing TvA and core stability, because one of the world's great researchers in this field, Dr Stuart McGill and some of his PhD students from Canada are spending a few working days with us. His detailed new book, "Low Back Disorders" (Human Kinetics) specially aimed at therapists will be of great interest to members of this list. What I have read of it so far has convinced me that it is a very useful and informative addition to my library. Dr Mel C Siff Denver, USA http://groups.yahoo.com/group/Supertraining/