Muscle Recruitment

Spend a few moments think­ing about your body. Notice your arms. Concentrate on where they are; how they feel; your per­cep­tion of their position.

Where do your arms end? Right where you are sit­ting now, move one of them and find out. As you move your arm, notice your body. Do you feel mus­cles mov­ing in your chest and back? Though we think of our arms as ter­mi­nat­ing at the shoul­der joints, their mus­cu­la­ture extends into the chest, down the sides, up the neck, and into the mid back.

Now think about your legs. Spend some time being aware of their sen­sa­tion and posi­tion. Then notice how their mus­cu­la­ture extends up to almost the shoul­der blades in the back and frames the abdom­i­nal mus­cles in the front.

How is this sig­nif­i­cant to your taido prac­tice? It’s obvi­ous that the body is com­posed not of sep­a­rate limb and organs, each with their own pur­poses, but of con­nected sys­tems that share com­po­nents for var­i­ous tasks.

For exam­ple, jump­ing uses quite a few more mus­cles than the quadri­ceps. Though the quads are the pri­mary exten­sor for the legs, pow­er­ful glutes, ham­strings, and hip flex­ors are every bit as impor­tant in jump­ing. As a result, the best exer­cises for devel­op­ing jump­ing skills are not in the squat fam­ily (which tar­gets the quadri­ceps), but in the group that includes dead­lifts and the olympic lifts (the clean and jerk and the snatch). These exer­cises work all of the mus­cles in the pos­te­rior chain as well as the hip flex­ors (the snatch being my per­sonal favorite — it’s whole-body explo­sive and can be per­formed with odd objects as well as bar­bells. Plus, it’s fun to say).

A more martial-artsy exam­ple is punch­ing. On a mar­tial arts dis­cus­sion forum on which i par­tic­i­pate, we once had a thread that went on for about 40 pages regard­ing the mechan­ics of a straight punch. “com­mon sense” seemed to indi­cate that the best punch would result from a straight path and pri­mar­ily involve the con­trac­tion of the tri­ceps, with the rest of the body act­ing as a mass-anchor. However, empir­i­cal evi­dence ran quite counter to this notion. There was some debate, and all kinds of pseudo-physics were employed to jus­tify dia­grams regard­ing moments of iner­tia and bal­anc­ing torques. In the end though, a punch is made up of sev­eral sys­tems of mus­cles, bones, and lig­a­ture work­ing in accord together.

A strong punch uses the entire body from the neck to the feet, and not just for iner­tia pro­duc­tion. Every bone in the body has the abil­ity to be used as a lever for pro­duc­ing effi­cient power. Therefore, it fol­lows that the strongest pos­si­ble punch will recruit the most joints in its mech­a­nism. Contrary to the pop­u­lar con­cept of the punch wherein the fore­arm and fist act as a bat­ter­ing ram pro­pelled by the upper arm and shoul­der, a supe­rior punch is one that begins on the floor and pushes lever-against-lever through the joints of the legs, hips, spine, shoul­ders, and arm sequen­tially. This lever action cre­ates curvi­lin­ear torques that build upon one another to deliver force that is greater than the sum of those gen­er­ated by each joint independently.

In light of the above, attempt the fol­low­ing thought experiments:

taido has no stand­ing punches. Think of five good rea­sons for this. Are there poten­tial weak­nesses to only punch­ing while in the air or kneeling?

Next, think about kick­ing and come up with five impor­tant fac­tors of kamae that effect taido’s kicks. How can we use kamae to improve our joint-recruitment in kicking?

For your phd — think about the rela­tion­ship between unsoku and tech­nique. How does kamae act to facil­i­tate this rela­tion­ship? Focus soley on the phys­i­o­log­i­cal aspects of this interaction.

You can spend as lit­tle as five min­utes or as long as sev­eral months think­ing about these ques­tions — your choice. If you like, write a com­ment below with your expe­ri­ences. Critical thought is impor­tant to the devel­op­ment of our per­sonal taido prac­tice, and shar­ing our dis­cov­er­ies is vital to the con­tin­ued evo­lu­tion of our art.

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