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Agility drill
Agility drills 〔Agility Drills.(2012). Retrieved August 15, 2012, from http://www.livestrong.com/agility-drills/〕 are used in the aim of improving sports agility, which is the ability to change direction and accelerate while in motion. The ability to change direction while in motion is very important in many sports but especially in team and dual sports. For example, a footballer running back must be able to quickly change direction when he sees an opponent preparing to tackle him and must be able to quickly change directions when dribbling the ball, attempting to get back on defense, or when trying to beat an opponent to the ball. A tennis player must be able to quickly change directions when moving to a position where the ball is expected to go but instead finds the ball going in a different direction.〔Yessis M. Build A Better Athlete What’s Wrong with American Sports and How to Fix It. Equilibrium Books, A Division of Wish Publishing, Terre Haute, Indiana, USA, 2006, pg 133〕
==Direction changes==
Many more examples can be given but in almost all cases sports agility requires the player to quickly change directions in order to elude or stay with an opponent. The latter is especially important in football, basketball and lacrosse when covering an opponent. If a player cannot elude his opponent he will not be able to fulfill his assignment or position task. For example, he will not be able to receive a pass or to break free of his opponent to execute or perform some important task.
The quicker and sharper the changes in direction, the better the athlete can elude or stay with his or her opponent.〔Yessis M. Build A Better Athlete What’s Wrong with American Sports and How to Fix It. Equilibrium Books, A Division of Wish Publishing, Terre Haute, Indiana, USA, 2006. pg 134.〕 The ability to make quick sharp changes in direction also enables the player to exhibit great quickness. In sports such as football there are many good running backs and receivers who can run fast in a straight line. But in order for them to be great, they must also be able to elude their opponents by changing direction quickly. If they do not have this ability they will never be great.
Thus the ability to change direction quickly while in motion is critical for sports success. Because of this coaches have devised many drills to improve this ability. In general, these drills are specific to different sports but some of them are applicable to many sports. For example, tumbling drills are usually more specific to swimmers who execute a flip turn and to gymnasts who use some aspects of tumbling in their routines on the apparatus or in free exercise.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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