Thread by @SteveEnglishbey

Within this it says that ..."the value of the extension torque is quite small." IF you have an understanding/appreciation of the the complexities of ballistic/dynamic THIS statement is VERY revealing.

https://twitter.com/setprosports/status/1452618331945685001

Here on twitter [and on my cite in much greater detail] I have talked about the very important concept of "interaction or motion dependent torques" wherein joint actions at joint A or being driven by joint actions that are NOT anatomically connected.

Understanding this is, I think, one of THE most important considerations that one needs to understand in terms of REALLY being able to accurately assess and ultimately effectively TEACHING movement development.

I think this understanding is crucial in terms of being able to really grasp the how muscle actions and postural dynamics are both cause and effect of MOMENTUM processes.

Processes which are utterly instrumental in either optimizing or degrading the potential to create high level movement in the specific context of being able to create very precise/ballistic loading/unloading.

In this overall context I want to again cite the comments from Mel Siff as regards the research from Gordan and Zajac some yrs, back

I could write ALOT about the following, but for twitter, suffice it to say that along with much of the Setpro info, the following article [with Mel's comments] forever changed how I think about ballistic dynamic movement.

Here's the citation [as cited by a smart trainer]
rawfit.co.uk/is-there-a-ben…

Note in his initial comments:
"I felt it appropriate to repeat here, because
we often encounter spectacular claims about the magical power of some rather
dogmatic methods of ‘muscle testing."

He's hinting here as to a somewhat skeptical assessment as to the accuracy/utility of so-called "muscle testing" [and I would include here the notion of "functional movement screens].

This argument is for another day, but I would for now simply say that the comments from Gordan, Zajac, and Siff certainly I think yield insight as to the inherent problems with these applied assessments in the context of dynamic/ballistic movement.

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