温哥华高尔夫教练—-理解球的位置对打球的影响 Ball Position
高尔夫球准备站姿的过程中最被低估的部分，毫无疑问是球位。如果高尔夫球手将球向前或向后移动一个球的距离（43mm），球的飞行轨迹可以急剧变化。
正常球位 (Neutral Ball Position)
球位靠前 (Forward Ball Position)
球位靠后 (Rearward Ball Position)
通常从里向外挥杆的球手，球位靠后，并且经常会打极度左曲球。而从外向里挥杆的球手，球位靠前，并且经常会打极度右曲球。这并不是巧合，因为球的位置可以决定击球时球是右曲还是左曲，以及杆面动态仰角。
理解这一点的关键是明白高尔夫挥杆轨迹是弧线形的，并不是直线的，因此球位在弧线上的哪一点非常重要，决定了击球位置是在弧线的前端、中端还是后端。绝大多数的情况下球位都是在我们的双脚之间，除非极少数的情况下，特殊疑难球站位球位会在双脚之外。
以下是不同球位击球的三种情况：
击球位置在弧线的前端
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如果杆面打开，球被击出后会向右直线飞出，如果杆面闭合，球被击出后会极度左曲。这两种球都会是低飞球，因为杆面仰角降低了。
击球位置在弧线的中端
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弧线中端的弧度最小，如果杆面正常（没有闭合或打开），球被击出后会直线飞出，且高度适中。
击球位置在弧线的后端
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如果杆面闭合，球被击出后会向左直线飞出，如果杆面打开，球被击出后会极度右曲。这两种球都会是高飞球，因为杆面仰角升高了。
一些术语
后旋 Spin: Place three balls on the ground; one across from your rear foot, one in the center, and one across from your left foot. All things being equal, you will push-hook the first one, hit the second one straight and pull/slice the third one. Pretty much every time. Remember, the face-to-path relationship can change dramatically with a ball position change of only a few inches.
挥杆平面 Swing Path: Here’s another underrated ball position dynamic: On the arc we are discussing, the in-to-out path is traveling AWAY from the player and on the out-to-in path the club is traveling IN to the player. This is why a good number of shanks are hit from an in-to-out path and toe hits often happen as a result of an out-to-in path. Think about it: If golfers are swinging out to in with a reverse pivot and the ball forward, they can actually miss the golf ball INSIDE!
击球角度 Attack angle: Any golf club that is moving to the right is also moving down (again for a right-handed player) and one moving left is beginning to ascend. So if you’re fighting too steep an attack angle, a slight move forward can help and vice versa.
杆面动态仰角 Dynamic loft: The sooner you catch the ball in the arc, the less loft you have on the golf club; the later, the more lofted the club face is. This is critical to understand because of the body’s reaction to trajectory. If the golf ball is too far back, you’ll hit it low and you’ll attempt to hit it higher by “backing up,” or reversing the torso away from the target, in an effort to hit it higher. It might just be easier to move the ball forward a bit and maintain your spine angle.
