For much of my life, certainly as someone who has devoted much of my life either as an athlete, or as a teacher of athletes, I have tried to live by and advocate a number of fundamental precepts.
Here's some of these: Development is a function of hard work, an ability to overcome any and all obstacles that may serve to impede progress ["grit"]; an ability to defer the immediate gratification impulse which may retard long term goals and progress.
An ability to honestly look within so as to see the kinds of personal behaviors that may be actually causing a lack of advancement to a higher level of development.
That, as opposed to all too easy alternative to find ways to blame others for your lack of advancement.
The ability to realize that much of the external world around you contains MANY things you cannot really control. BUT. You CAN control how you react to and perceive those externalities.
And in the context of developing your true potential, you NEED to learn how to react to these negative externalities in ways that do not impede or stifle your goals, motivations, etc.
In other words, development is a function of not allowing externalities ---those things outside of yourself that you cannot control---to deter your mindset that PERSONAL MERITORIOUS behavior is THE key to development.
Thus, succinctly stated, developing your true potential is a function of INDIVIDUAL BEHAVIOR and INDIVIDUAL MERIT. Without regard to the class, group, gender, race etc., that one my be subsumed within.
And to further reduce this [to simplify], what I am arguing here is that underlying true development is very much predicated on a MERIT based philosophy/mindset.
I have been around quite a few yrs. and as such I have witnessed over quite a few yrs. an ongoing attack on the the broad notion of a merit based theory of development.
I have seen this in may ways and in many varieties over the last 30 yrs. Suffice it to say that twitter is not the place for a full exposition of this argument.
Instead, I will [for now] simply point to an article written by a long time NYT reporter who has written one of THE best articles I have seen on this question of merit.
I really urge people to read this article by Richard Bernstein. Certainly no Trump supporter or some kind of alt-right conservative --which makes his argument more persuasive for some I suspect.
Quite a few instructors/commentators talk about "getting extension." Almost inherent to this notion is hitters [non-elite level] moving the lead arm AWAY from the chest, i.e., creating more space between the chest/arm.
But. Here's clip of Manny Ramirez showing the upper lead arm getting CLOSER to the lead pectoralis [from lag to contact].
Question: Why is this happening and is this an indication of good or not so good things happening?
I have cited examples of what I have referred to as a quick "heel exchange" wherein the back knee /heel flex AS the lead heel starts to plant. This kind of synergistic action very much "fits" with the hip rotation that occurs from toe touch to full foot plant.
As I have argued, this makes sense from a physics/ physiological perspective in that this back leg action, helps to "free up" back hip rotation.
If you go to .43 here you can see Jose Sosa creating this action [slow it to .25]:
Here's a clip of Trout in the minors [2010]:
Go to about .32 and slow it to .25 [using the settings]:
Note a number of movement parameters. 1] Many advocate the concept of "loading back." Note that Trout shows very little loading back ,i.e,. the center mass is NOT displaced much back towards the catcher. 2] There is very little dynamic back scapula loading action.
Meaning that the loading is relatively "static" [my term]. 3] Note HOW QUICKLY he rotates the entire trunk [hips to shoulders] from toe landing to full foot plant.
And though I have shown this one before, this one also shows a number of important movements/postures of the hips/shoulders/lead arm/bat: englishbeyhitting.com/videoclips/Ort…
On my website [as well as actually physically demonstrating this]I have written about the hips being..."the bottom of the swing plane." What does this actually mean? Well, here's a clip from the well known golf instructor Jim McClean who shows this pretty well:
I have seen over the last 10 or so yrs. a high degree of focus on the back leg and/or the back hip action as being THE KEY to creating very good hip rotation. This [of course] typically entails NOT any kind of rigorous argument of biomechanics or physiology.
No. It's simply an assertion along the lines of....."see...see this...THIS clip PROVES my assertion!!"
Well, yes. I do see the clip. And I do hear your assertion. But. You have not really convinced me.
I'm not at all convinced that ONE leg or ONE hip is THE causal link to high level hip rotation.