本研究目的旨在探討增強式訓練對青少年壁球選手下肢爆發力、移位速度及敏捷性影響之研究，本實驗係以12名高中生壁球運動員為受試對象，實驗分組採隨機方式進行分組，區分為實驗組及控制組。實驗為期八週，期間所有受試者都須接受每週3小時的壁球訓練，但實驗組外加每週3次共80分鐘的增強式訓練。在訓練前、後均進行垂直跳、專項移位速度、敏捷性等項的測驗，檢測所得參數以單因子共變數進行統計分析。結果顯示：實驗組在下肢爆發力垂直跳、專項移位速度及敏捷性能力均有明顯提升，且顯著優於控制組。建議未來在從事壁球專項體能訓練時，可安排增強式訓練納入正式的訓練課程中，亦是值得參考的一條良好訓練途徑。

The objective of this study was to investigate the effect of plyometric training on lower limb power, direction-specific movement velocity, and agility of junior squash players. Twelve high school squash players were chosen to be the subjects of the study. The study used a randomized design where players were randomly divided into an experimental group and a control group. The experiment lasted for eight weeks. For the duration of the experiment, all subjects received a three-hour squash training session each week. The experimental group received three extra plyometric training sessions, which lasting a total of 80 minutes each week. Counter movement jumps, direction-specific movement velocity, and agility were tested before and after each training session. The resulting parameters were analyzed using a single statistical analysis of covariance (ANCOVA). The result shows that the experimental group had a significant increase in lower limb power for counter movement jumps, direction-specific movement velocity, and agility, which were significantly better than for the control group. For implementing specialized physical training for squash in the future, plyometric training should be incorporated into formal training sessions, as it is a beneficial training method worth considering.