排球起跳動作，關係到排球選手運動表現，更牽扯到排球球員在排球網上的制空能力與雙臂防守面積。目的：本研究探討不同排球起跳動作（傳統式、擺臂式對於排球網上手臂得覆蓋面積與運動學表現。方法：本研究利用二台高速攝影機（HD Everio GZ-HM860, 300Hz）位於參與者矢狀面與額狀面距離九公尺處，拍攝攔網動作，並使用Kwon 3D動作分析系統進行分析，再以單因子變異數分析，Tukey法進行事後比較，顯著水準設定p ＜ .05。結果：排球選手不同攔網動對於下運動學表現上（跳躍高度、下肢關節角度、起跳速度）無顯著差異，而在額狀面覆蓋面積上，則有顯著差異。結論：排球選手擺臂式攔網雖然在額狀面表現上是優於傳統式攔網，但傳統式攔網仍有它的優勢存在，因此排球選手不同進攻方式，應該有不同的攔網方式，才可達到最高的運動表現。

Different jumping take off action may affect the performance of volley ball players, especially net controlling ability and arm defensive coverage. Purpose: the study explore different jumping take off action (traditional and swing-arm style). Methods: this study using two high speed camera (HD Everio GZ-HM860, 300H) placed in sagittal and frontal plane of the subject with the distance of 9 meters. Afterwards, picture was analyzed by Kwon 3D motion analysis system and statistical analysis was conducted by analysis of variance (ANOVA) with Turkey post-hoc with p ＜ 0.05. Results: different blocking action of volley ball players has no significant effect on sport performance (jumping height, lower limb’s joint angle and jumping speed). However, it has significant difference on frontal coverage area. Conclusions: although swing-arm style has better effect on sagittal coverage area than traditional style, traditional style has its own advantage. Therefore, different offensive ways need different blocking action to achieve the best sport performance.