The angle of application is even more critical when talking about stopping and changing direction. In performing a lateral shuffle, the angle of the power leg (the leg pushing the body in the direction of travel) must be positioned such that it doesn’t create an “up lift” of the body by positioning the feet too far under the hips, or a slipping effect by positioning the feet on too wide an angle outside the hips. The second technique is to apply force into the ground at an angle that allows the body to be pushed in the direction of travel most efficiently, known as the angle of force application. This may help you to see the importance of low level, quick response, multi-directional plyometrics in improving agility and quickness. The athletes must learn to apply force with stable joints to take advantage of the reaction from the ground. The reaction force out of the ground will have been dissipated because of too much absorption by the hips and/or swaying of the shoulders. If the defensive player allows his hips to drop significantly or shoulders to sway side to side or forward, this will have a definite impact on how quickly the change of direction is made. For example, if a basketball player is playing defense and in a shuffling action to stay with the ball handler, and the ball handler quickly changes direction, the defensive player must react and quickly apply force into the ground in the opposite direction of travel to move with the ball handler. The first technique is to use the reaction force from the ground as quickly as possible by not absorbing with a big flexion of the knees and hips. Now, how can this be applied to speed, quickness, and agility or overall athletic movement in any direction? There are a few techniques that must take place for the athlete to take advantage of Newton’s Law of Action-Reaction. As long as the object the foot is applying force to is stable and is not giving way to the foot, action and reaction forces should be equal. The force created into the ground or blocks, in this example, will be met with an equal force coming back at the foot. How does this apply to speed, quickness and agility? When an athlete makes a cut or comes out of the blocks, there is a quick force applied in the opposite direction of travel. Simply stated, it says for every action there is an equal and opposite reaction.
Maybe it’s time to dust off the old science books and take a hard look at the science behind speed, quickness and agility- Nah! All you really need to do is look at Sir Isaac Newton’s Third Law of Action-Reaction. Without understanding this concept of training, all the speed and agility drills in the world won't make you any quicker!Īpplying Newton’s Third Law of “Action-Reaction” to Make Your Athletes Faster A close look at what it really takes to improve your reaction time, speed, agility and quickness.
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