APA (Anticipatory Postural Adjustments)
Actually, the system I wrote in p1-14 has already been proved by some scientific experiments. And the system is called APA (Anticipatory Postural Adjustments).
For example, like figure18, when the subject tries to raise his arms quickly and suddenly, the lower body and core muscles generate power just before the upper body muscles do. More specifically, the hamstrings and erector spinae muscles contract before the deltoid muscles do.
Figure18: Work of muscles in arm-raising experiment
Next, I want to introduce another experiment for more profound understanding of APA. Like figure19, throw punches with your both hands right in front of you from a static state as quickly as you can.
In that experiment, your lower body should generate power just before your hands start to move forward. As a result of the lower body's power production, your whole body moves forward slightly, leaving the elbows behind the body trunk, which means a separation (frame2 of figure19). Thanks to this system, you can throw punches strongly without any intentional preparative motion.
Figure19: Double-punch experiment (movie1-14)
This way, our lower body can work automatically and therefore we don't need to use our lower body intentionally when we accelerate our hand. Besides, the lower body's power due to APA has a significant nature: It brings our body in the direction of where we want to accelerate our hand. That is because APA is one of the brain functions.
For example, if you try to accelerate your hand to the pitcher direction, APA moves your body to that direction. In addition, there is another important nature in APA: The faster you try to accelerate your hand, the bigger power your lower body generates. Conversely, the slower you try to accelerate your hand, the smaller power your lower body generates.
Figure20 is a sequence photo of an experiment (movie1-15) in which I gave a command to the subject like, "Try to swing directly from the position at which your body weight is on the rear leg (frame2), and don't make a separation intentionally because it occurs automatically."
As a result, separation occurred automatically by the automatic weight transfer due to APA. Those motions allow the subject to use his whole body's power effectively.
Through this experiment, you will be able to understand the difference between intentional weight transfer and automatic weight transfer unique to puncher-type mechanics. That is one of the core differences between swinger- and puncher-type mechanics.
This experiment is very useful to let beginners understand the basic mechanics of puncher type. If possible, you should videotape this experiment and show it to the hitter to let him understand that the separation occurs automatically.
Figure21: Alex Rodriguez and Joey Votto (movie1-13): They should have tried to swing directly from the white-framed cut. As a result, weight transfer and separation should have occurred automatically. They must have waited the ball in the white-framed position and tried to swing directly from there.
Actually, the system I wrote in p1-14 has already been proved by some scientific experiments. And the system is called APA (Anticipatory Postural Adjustments).
For example, like figure18, when the subject tries to raise his arms quickly and suddenly, the lower body and core muscles generate power just before the upper body muscles do. More specifically, the hamstrings and erector spinae muscles contract before the deltoid muscles do.
Figure18: Work of muscles in arm-raising experiment
Next, I want to introduce another experiment for more profound understanding of APA. Like figure19, throw punches with your both hands right in front of you from a static state as quickly as you can.
In that experiment, your lower body should generate power just before your hands start to move forward. As a result of the lower body's power production, your whole body moves forward slightly, leaving the elbows behind the body trunk, which means a separation (frame2 of figure19). Thanks to this system, you can throw punches strongly without any intentional preparative motion.
Figure19: Double-punch experiment (movie1-14)
This way, our lower body can work automatically and therefore we don't need to use our lower body intentionally when we accelerate our hand. Besides, the lower body's power due to APA has a significant nature: It brings our body in the direction of where we want to accelerate our hand. That is because APA is one of the brain functions.
For example, if you try to accelerate your hand to the pitcher direction, APA moves your body to that direction. In addition, there is another important nature in APA: The faster you try to accelerate your hand, the bigger power your lower body generates. Conversely, the slower you try to accelerate your hand, the smaller power your lower body generates.
Figure20 is a sequence photo of an experiment (movie1-15) in which I gave a command to the subject like, "Try to swing directly from the position at which your body weight is on the rear leg (frame2), and don't make a separation intentionally because it occurs automatically."
As a result, separation occurred automatically by the automatic weight transfer due to APA. Those motions allow the subject to use his whole body's power effectively.
Through this experiment, you will be able to understand the difference between intentional weight transfer and automatic weight transfer unique to puncher-type mechanics. That is one of the core differences between swinger- and puncher-type mechanics.
Figure20: Batting tee experiment: Yellow line is a yardstick line to see weight transfer.
This experiment is very useful to let beginners understand the basic mechanics of puncher type. If possible, you should videotape this experiment and show it to the hitter to let him understand that the separation occurs automatically.
Figure21: Alex Rodriguez and Joey Votto (movie1-13): They should have tried to swing directly from the white-framed cut. As a result, weight transfer and separation should have occurred automatically. They must have waited the ball in the white-framed position and tried to swing directly from there.
0 件のコメント:
コメントを投稿