Here is a visual example of the "violent" open close I was talking about. It is what I see in the hips on a lot of fast pitchers, even at a young age. It is the bam bam hip move you see in this clip, even in slo motion t looks sharp to me, that is why I used the word violent, but I am sure there is a better word for it.
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edit- added another clip for illustration- it happens earlier than I originally described, it is more of a 3 oclock bam open move and a 9 oclock bam close
I'm still reserving my judgement on how necessary a violent or ballistic opening is.
Generating energy and forward momentum is key, however, I'm not quite sure yet that needing to generate this energy in as short a time as possible is absolutely necessary. I'm leaning towards believing that generating this energy over a longer impulse might be acceptable as well. Pitchers that generate this energy over a longer impulse are sometimes viewed as smooth (or even lazy) but they still have great results. Sarah Pauly comes to mind here, in comparison to pitchers like Abbott or Osterman who have more violent motions. The athlete and spectator in me enjoys the force and violence more, but that does not mean it is necessary or even optimal.
I DO believe that "stopping fast" or being able to transfer the energy created as quickly, efficiently, and as violently as possible is absolutely key to pitching, and all of the core exercises posted above contribute significantly to this. The core is key to controlling and transferring both acceleration and deceleration.
All that said, having the strength, musculature, and ability to enact a violent and explosive drive is absolutely an advantage in my eyes. The pitcher may want to experiment with what kind of energy creation works for them, but without the ability to perform the different options, the pitcher limits their potential.
SS - These are great comments/observations. It's a fine line with student-athletes, too. If your description includes words like 'violent', 'explode', etc. they sometimes interpret these descriptors with movements you wouldn't anticipate. There are several keys... one of the largest ones is to spend the time with the articulations - putting their body in the right positions, and another is to make sure that these very athletic movements are performed within the boundaries of their physicality... and in control. From there, you build. The end result becomes what JJ describes - but teaching it to student-athletes becomes about building up... from a foundation. Sarah has a fluid set of movements and a REALLY, REALLY developed core. Her length may create the visualization that her legs aren't as energized - but when you watch her control of her torso - and know what is underneath the hood (to make this happen), you know there is a lot of power in that girl.yeah, I don't know how necessary it is either. I just seem to see it in correlation to faster pitchers. I picked up on it in a friendly last weekend because the pitching was so varied. Girls between 11-13 of all sizes and speeds. I noticed my DD looked really lazy compared to the rest of them, but when I looked at the slo motion video, her arm circle time was as fast or faster than the girls that looked faster (no I am not correlating arm circle to speed, I was just looking for visual clues as to why her motion looked slow), her speed was in the middle range of the group, but her motion looked the slowest out there by far. Then I noticed that her torso movements were just not nearly as strong looking as the other pitchers and I keyed on this hip move to see if maybe it was something to work on as a speed builder and thought I would throw it out to the group.
This is where I'm headed next... great segue. And as you said, it's ALL about control. I really enjoy reading your well-thought posts, starsnuffer. Thanks.I DO believe that "stopping fast" or being able to transfer the energy created as quickly, efficiently, and as violently as possible is absolutely key to pitching, and all of the core exercises posted above contribute significantly to this. The core is key to controlling and transferring both acceleration and deceleration.
As noted with SS... ground force resistance is the next topic... I think.. just need to organize my thoughts. All-in-all, by creating better coordination and getting your DD used to The Power Line (OP)... using a high knee drive, dorsiflexion, and positive forward angle (momentum) is going to increase her ground force resistance. Once she does this - and learns to absorb it correctly - you'll see some of this violence appear in the hips. It starts just prior to contact - and as she channels that energy up the torso, you'll see it. In the meantime - I'd make sure she has a solid foundation of core strength... heck... that might be the next post... lol I don't know... there's so much info I want share... oy vey...