排球前交叉步移位攔網運動學之初探

A Study of Kinematics in Leg-Forward Cross-Step Block of Volleyball

林婉婷(Wan-Ting Lin)

《大專體育學術專刊》 95年度 (2006/04) Pp. 437-441

https://doi.org/10.6695/AUES.200604_95.0078

摘要

排球的攔網動作是現今強力排球攻防重要的一環，攔網為高技術性的排球動作之一，理論上影響攔網技術的運動變數主要為移位速度及跳躍高度。本研究的目的為探討國內大專女子組第一級選手從三號位置移動至二號位置攔網時，採用前交叉步移位攔網動作各項運動學參數之分析。實驗儀器使用一部Sony數位攝影機拍攝受試者表現，以Kwon3D影像分析處理系統分析攔網者之動作。本研究主要結果為：（一）身體重心水平速度平均為2.86m/s。（二）起跳瞬間水平速度平均為0.65m/s。（三）起跳垂直速度平均為2.93m/s。（四）最高攔網點平均為1.64身高標準化。（五）開始移位起跳至最高點時間平均為2.21s。討論：由於交叉步移位攔網手臂經由胸前至肩膀直接向上拉起，以致手臂擺動速度較快，雙腳離地時間較短，推論可以獲得身體重心較快之垂直速度。建議：本研究並未包括各關節角度與績效評比做分析，日後可以採用更多實驗儀器做進一步深入探討，以期得到更全面的運動學或動力學參數，作為提供教練與選手日後對排球全面性技戰術之研究與訓練同時，提供實務者在訓練上之參考資訊。

關鍵字

排球 ； 攔網 ； 移位

並列摘要

The block is a critical factor in offense and defense for modern volleyball, and it is one of the high technical volleyball movements. Theoretically, effects on blocking variables are displacement velocity and jumping height. The purpose of the study was to investigate the kinematical parameters on leg-forward cross-step blocking movement the elite female varsity volleyball players use when moving from position three to position four. The performance of the subjects was filmed by a Sony digital camera, and Kwon3D image analyzing and processing system were used to analyze the blocking movements. The main results of the study were as follows: (1) The average horizontal velocity of body groups was 2.86 m/s.2. (2) The average horizontal velocity at takeoff was 0.65 m/s. (3) The average vertical velocity at takeoff was 2.93 m/s. (4) The average highest blocking point was 1.64 height normalized. (5) The average time from jumping to the highest point was 2.21 s. Discuss: Because the arm pulls up, passing the chest and then the shoulder when doing leg-forward cross-step block, the velocity of arm swing is faster, and the time is shorter when the feet move off the ground. So I infer that the vertical velocity of body gravity can be faster. Suggest: he study didn't include the analysis of every joint angle or the result evaluation. In the future, more experimental apparatuses can be adopted for further investigation, so that the parameters of kinematics or kinetics can be in depth and provided as a reference in the study and training on volleyball skills and strategy for coaches along with players.

並列關鍵字

volleyball ； block ； movement ； kinematics