目的：本研究的目的在足弓支撐鞋墊對複合弓選手在30公尺距離進行瞄靶射箭時，肩關節穩定度與足底壓力中心偏移之影響。方法：招募男生10名、女生5名共15名大專校院射箭隊複合弓選手為受試者（170.06 ± 9.81公分；79.06 ± 15.65公斤），依據受試者足型及腿型選擇相對應的足弓墊，並適應足弓墊4週後，再與一般足墊進行比較。檢測方法分成前後測驗：1.運動表現前測：採國際射箭總會規則進行個人對抗賽15支箭測驗並記錄射箭分數，使用足底壓力測量板與DELSYS加速規來測量足底壓力中心偏移和偏移面積參數與右側肩關節處的三軸加速規之數據。2.足弓墊的介入：比較足弓墊的介入與一般足墊對肩關節穩定度、足底壓力中心偏移和偏移面積參數與射箭運動表現之差異。3.運動表現後測。以成對樣本t檢定分析一般鞋墊與足弓墊肩關節穩定度的差異、足底壓力中心偏移和偏移面積參數之差異、射箭運動表現的差異並以皮爾遜積差相關進行事後比較。結果：射箭運動表現之平均箭值有達顯著差異，足弓墊皆大於一般鞋墊（p = .000）。足底壓力中心點之左腳壓力中心前後方向偏移量參數足弓墊小於一般鞋墊（p = .022）；右腳壓力中心之前後、左右方向偏移與偏移面積等參數足弓墊皆大於一般鞋墊（p = .000、.009和.033）。雙腳壓力中心之前後、左右方向偏移等參數足弓墊皆小於一般鞋墊（p = .014、.014）。左腳壓力中心前後、左右方向偏移、偏移面積與右腳壓力中心前後、左右方向偏移相關。雙腳壓力中心前後、左右方向偏移皆與左右腳的壓力中心前後、左右方向偏移相關。左腳的足底壓力百分比足弓墊小於一般鞋墊（p = .016）；右腳的足底壓力百分比參數足弓墊大於一般鞋墊（p = .019）。左後區的足底壓力百分比參數足弓墊小於一般鞋墊（p = .016）；右前區的足底壓力百分比參數足弓墊大於一般鞋墊（p = .014）。得分與左前區的足底壓力百分比參數相關。左後區的足底壓力百分比參數與右前區、右後區的足底壓力百分比參數相關。左腳的足底壓力百分比參數與右腳的足底壓力百分比參數相關。在肩關節三軸加速值中，X軸（前後方向）參數足弓墊小於一般鞋墊（p = .025）。得分與Z軸（上下方向）相關。結論：足弓支撐鞋墊對於射箭運動表現是有幫助的，能提升足底壓力中心點的密集度與集中性，且能分散雙腳足底壓力局部面積，增加下肢穩定性與減緩足部不適感，當下肢晃動程度降低能使選手穩定身體重心方面提高，讓上肢動作在放箭瞬間減少肩關節晃動的程度，以提升運動表現。
Purpose: The purpose of this research was to investigate the effect of arch-support insoles on shoulder stability and deviation of the center of the foot pressure in college archers who use a compound bow when shooting at a distance of 30 meters. Methods: 15 college archers (10 males and 5 females) using a compound archery were recruited as subjects (170.06 ± 9.81 cm；79.06 ± 15.65 kg). Their corresponding arch support insoles were selected according to their foot type and leg type. They were required to adapt to the insoles for 4 weeks. The measurement was divided into pre- and post-tests: 1. Pre-test: Subjects shoot 15 arrows according to rules of an individual match of International Archery Federation. The scores were recorded. A foot pressure measuring board and DELSYS accelerometer were used to measure the center of the foot pressure deviation and the three-axis acceleration of the right shoulder. 2. Intervention of the arch-support insole: The differences were compared between the arch-support insole and flat insole on the stability of the shoulder, deviation of the center of foot pressure and performances of the archers. 3. Post-test: A paired sample t-test was used to analyze the difference of the measured variables between the arch-support insole and flat insole. Pearson's product-moment correlation was used to analyze the relationship among the variables and score. Results: The scores of the arch-support insole were higher than the flat insole (p = .000). The anterior and posterior deviation of the left foot of the arch-support insole was smaller than that of the flat insole (p = .022). The left and right deviation and the center of foot pressure deviation area of the right foot were larger than the flat insole (p = .000, .009, and .033). The anterior and posterior, and left and right deviation of the center of pressure of both feet of the arch-support insole were smaller than those of the flat insole (p = .014, .014). The anterior and posterior, left and right deviation, and deviation area of the center of pressure of the left foot correlated to the anterior and posterior, and left and right deviation of the center of pressure of the right foot. The anterior and posterior, and left and right deviation of the center of pressure of both feet correlated to the anterior and posterior, and left and right deviation of the center pressure of each left and right foot. The distribution-percentage of the left foot pressure of the arch-support insole was smaller than that of the flat insole (p = .016); while that of the right foot pressure of the arch-support insole was larger than that of the flat insole (p = .019). The distribution-percentage of the left-rear part of the foot pressure of the arch-support insole was smaller than that of the flat insole (p = .016); while that of the right-front part of the foot pressure of the arch-support insole was larger than that of the flat insole (p = .014). The score correlated to the distribution-percentage of the left-front part of the foot pressure. The distribution-percentage of left-rear part of the foot pressure correlated to that of the right-front and right-rear part of the foot pressure. The distribution-percentage of left foot pressure correlated to that of the right foot pressure. In the three-axis acceleration values of the shoulder, the acceleration of the X-axis (anterior and posterior direction) of the arch-support insole was smaller than that of the flat insole (p = .025). The score correlated to the acceleration of the Z-Axis (up and down direction). Conclusion: The arch-support insole is helpful for the archer’s performance. It can increase the concentration of the center of the foot pressure, spread the distribution of the foot pressure to both feet, increase the stability of the lower limb and reduce the discomfort of the foot and the sway of the lower limb. It can further improve the player's stability of the center of mass, and reduce the shoulder sway at the moment of the archery release to improve the performance.
