2017年2月1日水曜日

Two Kinds of Different Swing Mechanics (2)

Chapter2  ~principles of the two types~

As the first step to understand the essential difference between the two types, puncher and swinger type, let me introduce two experiments that represent their fundamental principles. This is the most easy to understand explanation for the classification that even elementally school kids can understand.

(1) Swinger Experiment
Like figure1, Stand with your whole body relaxing, letting both arms down. Then, rotate the hip using the momentum of weight transfer. By doing so, your arms will swing around the body axis by centrifugal force and so on. In other words, You need not to swing your arms forcibly with your upper-body muscles ー the arm swing should be completely passive ー. This is the principle of swinger-type mechanics.

Figure1
 

Here is a movie of the swinger experiment.
Movie1 Swinger experiment 


(2) Puncher Experiment
Like figure2, make a stable and wide stance, squatting to some extent, and put your top-hand in the launch position. Then throw a strong punch directly from there suddenly and quickly without any preparative motion such as back swing, weight transfer, and separation. Firing with the maximum power like an explosion is very important. In this experiment, you should not move the lower body intentionally because it moves automatically when you try to accelerate the punching arm. Specifically, weight transfer and rotation occur automatically when you throw a punch quickly.

Figure2


Note: I tried to throw the punch directly from the frame1 of figure3, and as a result, stride, separation, and hip rotation occurred automatically. 
Figure3


Here is a movie of the puncher experiment.
Movie2 Puncher Experiment


Through these two experiments, you should be able to understand there are significant difference between them. Muscles involved, mechanical forces that are working, and feels are completely different between the swinger type and puncher type.