Over the yrs. I have had the great fortune of meeting dads who really wanted to learn how to help their sons or daughters reach their hitting potential. One such individual is Stu Byrne.
An engineer by profession, he did a remarkable job of using his engineering eye to learn "my stuff." He had a remarkable way of taking my words and creating DAMN GOOD! visual interpretations.
He created MANY clips--including quite a few still sequence clips which many on my site really liked:
Anyone who is familiar with my teachings knows that I am pretty thorough and pretty detailed oriented [a process 20 yrs. in the making]. Any newcomers are subjected to a basic process as regards the first time they hit with me.
The process works as follows: I very much understand what I refer to as the "high standard." And I know the process by which individuals go about the process of developing/working effectively towards that high standard.
I also very much know that both parents [typically dads] and players either think or have heard many things about "how the body works" as regards high level hitters. Many of these things are simply false.
As I have said before, when I was growing up in Pasadena/South Houston Tx. , if you were caught playing golf or soccer on a field, you greatly increased your chances of getting your ass kicked. Baseball was ok as being sufficiently masculine one could say.
And as regards someone approximating my physical stature, football was essentially mandatory, i.e., "son, with your body you HAVE to play football." And I did.
But yrs. later, in my pursuit of trying to understand how the body works in the context of swinging a bat, I found any number of golf instructors that I thought had a MUCH better understanding how humans swing an object [any object really] compared to most baseball instructors.
Note that at set-up the head is behind the knees. But by foot plant, the head moved away from the knees [and towards the plate]. Like what happens in a stiff-legged dead lift ,ie., hips are pushed back/head and upper trunk react by going the opposite direction.
This, of course, starts to set-up the swing plane and it serves to create eccentric/isometric tension in the posterior chain [hips, erectors--lower back--and back leg musculature].
Most familiar with my teaching, know that I emphasize --and have numerous drills/exercises forcing this--keeping the upper lead arm very tight to the body. The reasons for this mandate are both biomechanical/physiological and empirical [observing elite hitters].
An example of the latter is this clip of Prince Fielder:
Go to 12:22 [and slow it down even further via .25 setting]
This is a terrific example of what I refer to as keeping the upper lead arm very "tight" to the body.
...."centrifugal force-induced elbow extension motion"..
This statement very much relates to what I have talked about MANY times as regards the concept of "interaction" or "motion dependent" torques.
Meaning that from a CAUSAL perspective, joint actions you see ---and THINK --are a direct result of that joint, are, in fact, THE RESULT of OTHER joint actions [typically happening at a more proximal region to the hips or trunk].
From both an analytical and teaching perspective, this understanding is vital in terms of understanding how the body actually works in the context of swinging/throwing.
I grew up with 2 hitting idols: Williams and Aaron. I heard back then that Aaron had quick and powerful wrists. Thus I did I shit load of wrists curls starting when I was about 9yrs. old [I used a small wooden bar with a rope and weights attached].
I will say that, as a result of this, to this day my forearm musculature is pretty damn impressive!
But. As it turns out --as I learned yrs. later [and unfortunately after the fact ,i.e., dammit Paul Nyman why the hell could you not have been born yrs earlier!!]
the wrist strength ain't got much to do with how Aaron did what he did!!