目的:探討立即性介入足底踩按摩球後，是否影響腿後側柔軟度、垂直跳高度、 下肢發力率及向心功率峰值。方法:招募 21 位健身產業從業年限至少 1 年之一對一體 適能教練，先進行前測，使用坐姿體前彎工具收集柔軟度數據，用 kistler 測力板收集 下蹲跳跳躍高度、下肢發力率，接著，介入足底踩按摩球 30 秒 3 次，次與次間休息 30 秒，再進行後測收集體前彎柔軟度、跳躍高度、下肢發力率及向心功率峰值，探討足 底踩球介入後是否對下肢運動表現有立即影響。使用 SPSS 23.0 統計軟體進行資料分析， 以相依樣本 t 檢定方式比較受試者在前後測體前彎柔軟度、垂直跳高度、下肢發力率及 向心功率峰值之差異，顯著水準定為 α=.05。結果:足底踩球介入後可提升體前彎柔軟 度、垂直跳高度、下肢發力率及向心功率峰值。結論:立即性足底踩按摩球 30 秒 3 次， 可提升柔軟度與下肢運動表現，是一種快速且方便執行的方法，建議在體適能課程訓 練前與競技運動員比賽前，加入課表安排中進行。

Purpose: This study investigated whether the acute effect of plantar fascia relaxation would impact the flexibility of the hamstring, vertical jump height, rate of force development of the lower limbs, and centripetal peak power. Methods: The study included 21 one-to-one fitness gurus who have worked in the fitness industry for at least a year. Ask them to take a pretest and use the sit and reach tool to measure the flexibility, and do the counter movement jump on the Kistler force plate to collect vertical jump height and rate of force development data. Each plantar massage ball session on each leg with 30 seconds thrice with a rest period of 30 seconds each time, and collect flexibility, vertical jump height, rate of force development, and centripetal peak power. To explore whether the intervention of plantar massage balls has an acute effect on the performance of the lower limb. Data analysis using the SPSS version 23.0 statistical software, and the paired sample t-test were used to compare the subject’s pre to post-test and flexibility, vertical jump height, rate of force development and centripetal peak power. All significance levels are set to α = .05. Results: There can be improvements in the post-test outcomes regarding flexibility, jump height, rate of force development, and centripetal peak power. Conclusion: Using the plantar massage ball for 30 seconds thrice can be fast and convenient vis-à-vis increasing flexibility and lower limb performance. Thus, its inclusion in the class schedule before the physical fitness course training and prior to the actual competition is recommended.

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