I want to make a few comments about "those who studied House [circa 2000]". I was most certainly around when Paul started critiquing some of House's info starting around 2001.
I bought Tom's bk. [1st ed.] on pitching mechanics. So, I am VERY aware of Tom's concepts such as "find the balance point" and "pause at the top." What struck me in these pgs. was an example of ---allegedly --- being ..."out of balance."
An ex., in other words of some type of inefficient postural/loading dynamics. The ex. he cited was Ron Guidry. Now, for the uninitiated Guidry was maybe 5'11" and 160 lbs. And he topped out at....98MHP!!
I certainly remember my first reaction to this assertion: "Well, if this is an ex. of inefficiency then I want to be as inefficient as this son of a bitch!!"
I spent a little time to try to get a side view of Guidry. But I could not find a clip. But here is a you tube of Guidry's 18k performance:
And at about 1:39/1:40 you CAN see a side view [I always say to use the settings to slow this to .25.
House used a similar stop action photo to assert that Guidry was "leaning back" too much ---thus "out of balance" ---thus inefficient.
If one plays around with this clip and stops it at various points from leg lift to hand break, AND if one has a good understanding of Jim Dixon's "Exceptional Player" bk. one can readily see/understand that these movements are certainly NOT inefficient!!
Most certainly Guidry is NOT "leaning back" ---rather the center mass is "falling" [controlled fall] "against" a VERY stable back leg. This results in a slight tilt of the trunk as he lifts the leg and starts to move forward with the hips.
THIS kind of loading of the hips/trunk against the very stable back leg IS ...DAMN GOOD loading/movement. And serves to facilitate the sequencing and loading of the back scapula [retraction] AS the hips start to unload [rotate] into foot plant.
Simply put---and I am NOT trying to be "mean" to Tom House---he simply could not see this. How was I able to see what I thought at the time was obvious---but he did not?
Well, simply put, I had [up to that point] spent a tremendous amount of time exercising and working with athletes [non-baseball at that point].
AND THAT experience combined with the info from Setpro that I was destined to run across as I started to search for info and think about teaching hitters/pitchers [around 2000].
I really think that it was this combination that allowed me to see what House could not see at that time.
I should add here that some yrs. later, Tom House issued publicly a mea culpa of sorts in that he admitted that many of the things he HAD taught he NOW realized were wrong.
THE correct corollary would have been to simultaneously issue at least a partial refund to all those who had spent time and money on said incorrect info.
But of course like politicians whose idiotic policies essentially NEVER result in these individuals having to fully account for their ignominious actions, he did no such thing.
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.
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've known Justin since he was about 14. I have worked with him via my website as well as a number of times in person. A VERY good student, i.e., very focused, willing to listen, highly motivated to improve, and works at it in smart ways.
"Very focused". I saw this the first time I worked him in person. Prior to actually hitting, he did a dynamic warm-up routine with the kind of seriousness, focus, and precision that you almost never see from athletes. I said to myself, "this guy's gonna be fun to work with!!"
Though not a big guy, he definitely was [and is] a guy who you know has the intent to swing hard. I worked with him over these yrs. to develop slightly more precision of movement and he has worked at this well I think.
Let me add here as to the dubiousness of the concept of "riding the back leg" the fact that I have been talking about "cues vs. reality" for over 15 yrs.
The quote of "cues vs. reality" comes from Paul Nyman around 2001. That's about when I first ran across his website. He caught my attention with 2 articles. One was entitled: "Momentum is the most misunderstood thing in all of sports." And: "Cues vs. Reality."
In which he argued that the cues that many instructors use do NOT really describe what hitters/pitchers are ACTUALLY doing, i.e., the cues do NOT describe the actual "underlying realities" that actually create high level movement.
A few yrs. back I was working with a young hitting instructor in the context of trying to help him become a more effective instructor. He was working with a hitter and he kept saying to this hitter..."you need to sit more."
I stopped the instruction and ask the hitter: "Do you actually know what he means?" And the hitter said: "No, I really don't." I then ask the instructor to SHOW the player what he meant.
And what the instructor showed him--from my vantage point of someone who was THE guy who originally defined this term yrs. ago in detail [based on empirical observation AND thousands of hrs. of personally practicing movements],was NOT an accurate description of "sitting."
First let me say that I agree that the bottom clip is a better swing. Simply put it's more efficient. What do i mean by this? Simply put, it's quicker from initiation to contact. Then the question is why is this the case?
To put it into a basic context I have used to analyze elite level hitters: They do 2 things well:1] they create very good bat/body alignment from initiation to contact and;2] they rotate the trunk really well.
Paul Nyman recently cited this as regards how many typically tend to interpret/analyze information: exploringyourmind.com/only-hear-want…
You should read all of it. But I'll cite a few excerpts.
"The information we choose through our attention mechanism doesn’t always have to be the most valid or relevant. We rather try to pay attention only to the things that confirm our beliefs or opinions."
...." we look for environments that reinforce our beliefs. Since everyone around us thinks the same way we do, we believe our opinion is the one that’s right."