Читать книгу Straight Lead. The Core of Bruce Lee's Jun Fan Jeet Kune Do онлайн

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Keep in mind that one of the underlying principles of the straight lead design is Newton’s third law, which states that when an object exerts a force on another object, that second object exerts an equal and opposite force on the first. You’ve probably heard it stated as, “For every action, there is an equal and opposite reaction.”

Physicists will tell you that the application of force is not so much one thing acting on another as it is an interaction between two objects. So in our example of tapping the wall with the top two knuckles, you exert a force on the wall, and that jarring you feel through your shoulder and elbow is the wall exerting a force on you.

Another example would be the focus pads. You can only exert as much force on the mitt as your trainer is exerting back toward you. Notice that when your trainer doesn’t give you much resistance, you cannot punch with very much force. But if your trainer gives you more resistance, you punch with more force (and have a lot more fun). As another example, think of trying to punch a piece of paper, versus hitting the heavy bag. No matter how hard you try, you can only hit that piece of paper so hard, because it cannot exert much force back. The heavy bag, on the other hand, allows you to hit much harder because it sends back a much greater force.