Effect of plantar pressure variation during shooting procedure on archery performance

• Main Authors: ChingYi Lin, 林靜宜
• Other Authors: WenHsin Chiu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/55740274500150479022

碩士 === 國立新竹教育大學 === 人資處體育碩士專班 === 98 === Archery is a sport which seems simple but is quite complicated in reality, and the accuracy of archery motions would have to be assessed by related instruments. Archers can gain efficient support by properly adjusting their planter pressure location and distribution. In this research, we studied the planter pressure variation of eight high school archers, whose height are between 166.13±9.35 cm, weight are between 61.63±11.17 kg, and archery experience are between 5.38±1.32 years. We separated an archer's foot into three areas: the forefoot area, the middle-foot area, and the heel area. We collected data via EMED-PEDAR planter pressure insole system, and analyzed the data by two-way ANOVA and one-way ANOVA (p< 0.05), to understand: 1. the relationship between scores and planter pressure distribution on left, right, or both feet; 2. the relationship between scores and each shooting phase's planter pressure distribution on left, right, or both feet; and 3. the variation of the moving distance and area of the pressure center on each scoring group. The results showed that: 1. In cases of higher scores arrows, the ratio of heel area is larger than that of middle-foot area. In cases of lower scores arrows, on left foot, the ratio of heel area is larger than that of middle-foot, and on right foot or both feet, the portion of forefoot is larger than that of the middle-foot. These mean that the distribution of body weight tends about middle-front. 2. On the analysis of moving distance and area of the pressure center, in cases of higher scores arrows, the moving distance is largest while the moving area is the smallest; in contrast, in cases of lower scores arrows, the moving distance is the smallest, while the moving area is the largest. The reason maybe that after being trained for a long time, archers attain better control of limb than ordinary people. Although the pressure center is changed induced by body movement, archers with better performance have the ability to compensate the difference of pressure center location. Therefore, despite the moving distance is larger, archers with better performance can apply their compensating ability to make the area of moving trajectory smaller. However, archers with worse compensating ability may not compensate the pressure center difference induced by body movement; consequently, the moving distance is smaller, but the area of moving trajectory is larger.