tag:blogger.com,1999:blog-1232825159765940340.post28837951175259992..comments2023-12-29T22:43:36.136+02:00Comments on Soo Shim Kwan 水心館수심관: Impact and Momentum TechniquesSkryfblokhttp://www.blogger.com/profile/00329458286217107784noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-1232825159765940340.post-80665656071693605472012-12-20T10:02:05.325+02:002012-12-20T10:02:05.325+02:00Hi Stuart,
Thanks for this. Yes, I'm also qui...Hi Stuart,<br /><br />Thanks for this. Yes, I'm also quite happy with F=M.a <br /><br />That has always been for me one of the great attractions to ITF TKD. Even though the ITF Encyclopaedia does make reference to such Oriental concepts like Ki, it is not foundational to the style -- it all comes down to simple Newtonian physics.SooShimKwanhttps://www.blogger.com/profile/08864922377526465321noreply@blogger.comtag:blogger.com,1999:blog-1232825159765940340.post-72279474351067616652012-11-05T02:38:21.813+02:002012-11-05T02:38:21.813+02:00Glen's interpretation of the physics involved ...Glen's interpretation of the physics involved is badly flawed.<br /><a href="http://sci-ence.org/red-flags2/" rel="nofollow">Energy is a measure of work capability, it is not a magic cloud</a>.<br />Impact is instantaneous, relaxing immediately after the strike may have many benefits, but trapping the impact energy in the target is not one of them. There is only ever speed and weight, and every type of strike from a pushing teep to a fajin punch is a balance/compromise between the two. <br />Everything that happens after impact is exactly that: something that happens <b>after</b> impact. This "bouncing energy" thinking is a very common error in martial arts physics (both Teri Tom, who wrote an excellent book on the straight lead, and Dan Djurdjevic have been guilty).<br />Times arrow flies in only one direction, you can't suck impact back out of a collision by being stiff, you can't add impact by removing your hand from the target more quickly (another related idea I have come across once or twice).<br /><br />Everything reduces beautifully to speed/weight (weight also being a function of structure) on impact, and keeping to these parameters has been an enormous help to me in my understanding.<br /><br />So then the true value of what Glen is describing has to be an aspect of either weight/structure, or speed, or both.<br />To me it seems fairly obvious that the "sneezing" aspect is employing sudden muscular contraction across the whole body in a very cohesive fashion, so speed is gained, and of course his structure delivers the weight.<br />The sudden relaxation has many obvious benefits; from a relaxed position you can strike again immediately , a relaxed arm wont pivot the body if a punch is deflected, you wont be unbalanced by subsequent pushing after the the collision, and not least of all - you are not wasting energy after the job is done.Stuarthttp://www.hxtaekwondo.comnoreply@blogger.com