Interesting... though there is something about the title...
I don't know really if there is something that could be called
Non-concentric Martial Arts. That seems like a very broad term. Maybe better to narrow it down? "Biomechanics of Non-concentric body methods of Asian Martial Arts" might be a better title.
"Not tensing up" is one aspect of the practice to stay relaxed, stay in balance and remain physical and mental control. Nothing wrong about focusing on details IMO.
But "not tensing up" is something even good boxers do. A larger package where the
main focus of practice is on staying relaxed, staying in balance and remain physical and mental control might be more representative for certain types of martial arts. To narrow it down to IMA and similar, you also need to bring in cultural aspects, history and thought.
cloudz wrote:It is also nonsense to link use of "brute strength" with concentric muscle contraction. The above scientific proof shows that this tai chi master used both eccentric and concentric muscle contraction to move through the form sequence - so according to Yeung is using "brute strength". Bullshit is bullshit, sorry.
This is something I don't quite agree with. The point is not how the muscles naturally work when you move them, but certain arts' focus on not deliberately or unwillingly tensing up the muscles when you perform a technique or use a certain method. Of course every Tai Chi practitioner uses both eccentric and concentric muscle contraction to move through the form. But you don't use deliberate effort to tense up the muscles. A Tai Chi form is not a isometric muscles strengthening technique where you use intense isometric muscle contraction. The focus is different. Maybe the title "Non-concentric" is not the best term to use, but there are certainly different focuses and philosophies about how to use muscle contractions in different martial arts.