Analyses of the Relationship between the Aiming Time and the Shot Points in Archery

射箭瞄準時間與箭著點之分析

林國斌(Kuo-Bin Lin) ； 黃啟光(Chi-Kuang Hwang)

《大專體育學刊》 7卷4期 (2005/12) Pp. 161-173

https://doi.org/10.5297/ser.200512_7(4).0015

摘要

本研究主要的目的是在探討射箭選手瞄準時間的長短與箭著位置之相關性。以國立體育學院6名射箭專長選手為受試對象，分別利用兩部數位攝影機，一部來拍攝每位受試者瞄準的過程，並利用影月的張數來換算出瞄準的時間；另一部攝影機則是在拍攝每箭的箭著位置後，分別將每箭箭著之水平、垂直方向及其與中心點之距離，與瞄準時間作相關性分析。通常選手瞄準時間的長短，可能會影響其射箭的穩定性，亦即，可能會與選手瞄準的一致性或韻律性有關。因此，在本研究較長瞄準時間的分類中，其應會與箭著離中心點半徑(R)呈現正相關性，而這現象也在本研究中得到印證。但從分析中亦發現仍有部分選手其箭著位置在水平(X)及垂直(Y)方向的相關性，卻有呈現負相關的現象。此外，本研究結果亦發現一些有趣的現象，如選手平均瞄準時間較長時，其箭著在垂直方向的變異量，較容易呈現負相關的特性；但如以成績而言，成績較高者，在水平方向之變異量是呈現正相關性，而成績較差者，卻有呈現負相關的特性；其中成績最佳的第一位射手，不論在水平或垂直方向變異量的相關性，皆具有一致性。此外，本研究因觀察到所分析的相關係數具有單調性的現象，故採用偏相關分析法做進一步的分析，結果發現射箭選手如能減少較長的瞄準時間，將有助於提升其成績表現。

關鍵字

射箭 ； 瞄準時間 ； 相關性 ； 箭著點

並列摘要

This study examines the relationships among the stability of the archer, adjusting time during the aiming procedure, and the shot points on the target. Records of six specialists from the archery team of National College of Physical Education and Sports are analyzed in this research. The aiming time of each archer is converted from the recorded films by a digital video camera, and the results of the shot points on the target are also recorded by another one. Correlation coefficients between the aiming time and the shot points on the target, in the vertical, horizontal and radial deviations, are all analyzed. The stability of an archer is usually related to variation of the aiming time, so the positive correlation between the elongated aiming time and the shot point coordinate along the radial direction is expected due to the aiming consistency and rhythm, and this phenomenon has been confirmed in this paper There are also sonic other interesting findings. For example, a large mean value of the aiming time may cause a negative correlation along the vertical direction; the higher the score is, the higher the positive correlation between aiming time and shot points on the target in the horizontal deviation will be, the best scoring archer has a very high consistency in both vertical and horizontal directions. A large mean value of the aiming time may cause negative correlation along the vertical direction, due to the combined effect of the aiming time, the muscle strength, the arrow speed, the gravity and the vertical deviation of shot points. A partial correlation is also implemented as the monotonic correlations have been observed. And based on the partial correlation ii can he concluded that the archery performance can be improved by reducing the elongated aiming time.

並列關鍵字

archery ； aiming time ； correlation ； shot points

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