目的：本研究欲透過 40 公分高台落下跳躍連續施測結合不同間隔休息時間探究此連續施測之實驗設 計是否會對實驗結果形成自身影響。方法：以 15 名大學體育與運動科學系之非校隊之男性學生為研 究對象，進行 40 公分高台落下跳躍 3 次，次間休息之操弄共分為三種：30、60、120 秒。以兩塊三 軸測力板與八台光學攝影機同步擷取資料。以 SPSS for Windows 14.0 版套裝軟體進行統計分析，並 以重複量數單因子變異數分析 (one-way ANOVA)，分別比較以 30、60、120 秒為高台落下跳躍連續 測試次間間隔休息時間為安排時，各運動生物力學參數在三次跳躍的各次結果 (DJ1, DJ2, DJ3)，以及 三次結果的平均值 (DJm) 間是否有差異。統計顯著水準訂為 α=0.05。結果：以 60 秒為次間間隔休息 時間時，DJ2 以及 DJm 的最大蹬伸力量與反應肌力指數，顯著的較 DJ1 時大 (p < 0.05)，著地期時間 以及膝關節屈曲、蹬伸角位移，顯著的較 DJ1 時小 (p < 0.05)。結論：本研究在連續三次施測的 DJ 實 驗中發現，以 60 秒為次間的間隔休息時間時，測驗本身應會對最大蹬伸力量、著地期時間、反應肌 力指數，以及膝關節角位移形成影響。若以 30 秒或 120 秒為次間的間隔休息時間進行連續施測，則 較不易對結果參數形成影響，且以任一次跳躍之結果或以三次結果的平均數進行資料處理，應不會 有差別存在。以此，可作為實驗設計或訓練安排時之參考。

Purpose: The current study is dedicated to exploring whether the lengths of rests between tests interfere with internal validity of the experiment. Drop jumps from a 40-cm-high platform were discussed in this study. Method: 15 male non-varsity-team undergraduate students from PE department performed drop jumps 3 times repeatedly. Rests between tests were set to be 30 seconds, 60 seconds, and 120 seconds per the purpose of the current study. Kinematic and ground reaction force data were collected using 8 optical cameras and 2 force platforms. A repeated-measure one-way ANOVA was adopted to examine whether the biomechanical parameters were statistically different across drop jumps with different lengths of rests (DJ1, DJ2, DJ3) and between the means of them (DJm). Significance level was set to α=0.05. Results: For tests with 60-sec rest, the peak ground reaction forces and reactive strength indices for DJ2 and DJm were significantly greater than those for DJ1 (p

活化後增益作用; 反應肌力指數; 淨關節肌肉功率; 關節角度

post-activation potentiation; RSI; peak net muscle joint power; joint angles