Kyle Boddy follows in the infamous footsteps of Chris O’Leary, i.e. makes up his own interpretations of what others have said.
[quote]Paul Nyman described the ultimate goal of developing pitching velocity as connecting momentum in the delivery, that connective tissue are springs that are to be loaded and unloaded. Nyman’s general descriptions of intent and momentum in the delivery were (and remain) breakthroughs in understanding how velocity is really developed.
However, the fact that momentum is conserved has been twisted when it comes to baseball pitching mechanics. Nyman and others have posited that a constant flow of momentum being connected from proximal to distal is ideal for developing elite fastball velocities.
Let me be clear about this: I agree with the overall modern day understanding of the kinetic chain (proximal to distal, largest to smallest), but not with the idea that momentum is conserved in such a manner. What is being described is simply efficient sequencing of body parts, not the “elastic storage” of energy necessarily.
Let me be clear about this: I agree with the overall modern day understanding of the kinetic chain (proximal to distal, largest to smallest), but not with the idea that momentum is conserved in such a manner. What is being described is simply efficient sequencing of body parts, not the “elastic storage” of energy necessarily.[/quote]
This is where Boddy demonstrates his ignorance (and arrogance) of the physics. A whip is the perfect embodiment of the kinetic sequence.
First, never and I repeat NEVER have I said, implied either directly or indirectly that conservation of momentum has anything to do with the storage of elastic energy. And for those who forget my background is technical (physics/electoral engineering) so I am very careful when it comes to discussions regarding conservation of momentum and/or the transfer of momentum.
From a throwing perspective conservation of momentum only comes into play in terms of the whip affect. The whip effect converts larger mass slow moving segment to small mass fast-moving segment i.e. momentum is conserved. Has nothing to do with elasticity.
Second that with respect to throwing a baseball the main whipping sequence is a result of arm action. The main reason for this is because of the loop that is formed by the upper arm, forearm and wrist/hand. Is the unfurling of this loop that creates whipping action.
Momentum from the largest body segments such as the legs, hips, upper torso are not whip affect with respect to rotation around the bodies long axis. Momentum is transferred from one body segment to the next via the mechanism of connective tissue and muscle.
What makes the the segments of the body different than the whip effect is that by segments are connected by muscle and connective tissue. Muscle has the ability to add additional velocity to the kinetic sequence by virtue of being able to stretch and then contract. But the timing of this stretch contraction is very important in terms of maximally transferring momentum from one segment to the next. For maximum transfer to take place connection between segments such as the hips and the upper torso must take place at the previous segments maximum rotational velocity.
This is where Boddy’s comments such as:
[quote]1. Hip rotation velocity is simply not that important.
Comparing the Elite Group (85-89 MPH in lab settings) of pitchers with the Mediocre Group (74-77 MPH in lab settings) of pitchers reveals that the elite throwers have a mean maximum pelvis rotation velocity of 598.5 deg/sec while the mediocre group was at 532 deg/sec. A delta of 66 deg/sec was less than one standard deviation (522 to 675, SD of 76.5) in the elite throwers’ group for hip rotation velocity.[/quote]
For the following reasons:
- 85-89 mph does not constitute elite throwers. There are many inefficient ways to throw 85-89 mph. As I have said in a previous post every pitcher that I have seen asking for help on this forum and posting a clip of themselves exhibits very poor sequencing the lower body parts i.e. they do not transfer momentum from the lower body parts to the upper body parts optimally.
Examples of players who do transfer our players that Hired Guns has posted. My point being that studies that attempt to quantify what constitutes effective mechanics that use pitchers who are throwing 85-89 mph do not represent what I would consider optimal mechanics.
- From that same study that Boddy refers to regarding hip rotational velocity here is that studies conclusion:
Boddy’s references to support his contentions from this study is called “cherry picking”.
In other words what’s critical is sequencing and optimally transferring momentum from one segment to the next i.e. kinetic chain. Specifically you can have two players with the same hip rotational velocity and if one player misses transferring momentum to the next segment by .01 seconds, much of the benefit of the previous segments momentum will be lost. Again if you know something about physics this make sense.
For those who would like to read what throwing a baseball is really about please see:
There’s a lot more that I could say that I really don’t have time for. Other than to repeat
Another pathetic attempt…
… at pseudo science… :puking: