Gary- Yes, the martial arts do promote this (partly for the reason some think it violates tennis rules- it is partly for intimidation). It helps prevent "Valsalva maneuver" which causes brief hypoxia and may cause rupture of the eustachian tubes and even risks the ear drums in extreme cases. Valsalva also causes increased pressure within the thoracic cavity which impedes venous blood returning to the heart. So to the extent that the expelling of air prevents it, that's a good thing. Anyway, the martial arts also promote this to expel air from the lungs in the case of impacts (with the ground or a punch for example). It does help prevent pneumothorax- as a bicyclist, we are also taught to expel air if we crash. Tim _______________________________ Timothy O. Shearon, PhD Professor and Chair Department of Psychology The College of Idaho Caldwell, ID 83605 email: [EMAIL PROTECTED]
teaching: intro to neuropsychology; psychopharmacology; general; history and systems "You can't teach an old dogma new tricks." Dorothy Parker -----Original Message----- From: Gerald Peterson [mailto:[EMAIL PROTECTED] Sent: Thu 7/17/2008 12:37 PM To: Teaching in the Psychological Sciences (TIPS) Subject: RE: [tips] The tennis grunt Yes, and doesn't martial arts training promote this idea too? It should be easy enough to empirically examine whether such shouting might help increase the power of a kick or tennis hit. It would seem to make sense, but I will leave responses to those more expert. We might even come up with some class demonstration ideas. Gary Gerald L. (Gary) Peterson, Ph.D. Professor, Psychology Saginaw Valley State University University Center, MI 48710 989-964-4491 [EMAIL PROTECTED] --- To make changes to your subscription contact: Bill Southerly ([EMAIL PROTECTED]) --- To make changes to your subscription contact: Bill Southerly ([EMAIL PROTECTED])
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