高爾夫球短距離擊球之運動學分析－－以高、低差點愛好者為例

Short Game Kinematics Analysis - Low and High-handicap Golf Lovers

目的：探討高、差點高爾夫愛好者短距離擊球運動學分析。方法：利用模擬高爾夫設備(GOLF ZON)擷取100、80、60、40碼擊球的距離、飛行距離、滾動距離、發射角度、2倍角正弦、球速、理論水平距離、剩餘距離、方向、桿面角度及左右距離的資料，討論低、高差點的高爾夫球愛好者在短打擊球揮桿動作的人體運動學變化，來探討不同距離的揮桿是否有不同差異。結果：低差點組的平均剩餘距離及方向的控制比高差點組佳；而不管短打擊球的距離是多少，從球的飛行距離到停球距離，其滾動距離大概需5-8碼，也就是說球的落地必須在旗桿前的5-8碼才能更接近洞口；低、高差點組在短打的擊球時，隨著距離的縮短，球速將會變慢；比較斜向拋射公式計算所得，理論水平距離與實際飛行水平距離，理論值較小，原因則在於球桿與球接觸時桿面角度不為0。結論：高爾夫在短打擊球時，低差點組在球速與發射角度互相配合之下，使用較少能量將球擊出且達目的，而高差點組則相反。

Purpose: Analysis of short game kinematics of low and high-handicap golf lovers. Methods: Golfzon has been adopted to capture data of 100, 80, 60 and 40 yard ball distances, flight and running distances, emission angles, sin 2α, ball speed, theoretical horizontal distances, surplus distances, directions, golf club loft angles and left or right distances to the hole to discuss kinesiological differences of low and high-handicap golf lovers. Result: Data of low and high-handicap groups obtained from Golfzon indicated that the control of average surplus distance and distance of the low-handicap group is better than the high group. No matter the distance after golf balls hit out, the running distance is about 5-8 yards. That is, to be closer to the hole, balls should land about 5-8 yards before the pole. As to hit for a shorter range, ball speed becomes slower. Comparing calculated data from projectile movement formula, data of theoretical horizontal distance is smaller than actual flight horizontal distance. It is because of the loft is not zero as the club head hit the ball. Conclusion: As there is a good match of ball speed and emission angle, the low-handicap group easily reached the goal with less effort to strike a ball, whereas the high-handicap group is opposite.