本研究目的在探討8週全身振動訓練(whole-body vibration training, WBVT)對手球運動員垂直與十級跳躍表現的影響。16位大專甲組手球運動員,以立意取樣均分為人數相等之控制組及實驗組,兩組運動員皆接受例行每週5次之手球專項訓練,但實驗組需額外接受連續8週、每週3次、振幅2 mm、頻率20 Hz至40 Hz的WBVT。垂直跳躍表現是以蹲踞跳躍(squat jump, SJ)與下蹲跳躍(counter movement jump, CMJ)最大跳躍高度為評估指標,而十級跳躍表現則是以10次單腳跳遠最大距離為評估指標,所得數據以前測表現為共變數,進行單因子共變數分析兩組間於訓練後各變項的差異情形。本研究之結果:實驗組經由8週WBVT後顯著增進SJ高度(40.92 ± 2.96 公分vs. 48.40 ± 4.70公分, F = 5.14, p < .05)、CMJ高度 (47.25 ± 7.48公分vs. 52.20 ± 6.25公分, F = 5.31 , p < .05)與十級跳躍距離(25.03 ± 1.83 公尺vs. 26.26 ± 1.65公尺, F = 5.45, p < .05)。本研究之結論:本研究驗證8週額外WBVT可有效提升手球運動員的垂直與十級跳躍表現,其機轉應與運動員訓練後強化的運動單位同步作用與徵召速率、增進收縮肌群SSC效益與改善下肢神經肌肉肢體協調有關。
The purpose of this study was to evaluate the effect of eight weeks of whole-body vibration training (WBVT) on vertical and decuple jump performance in handball athletes. Sixteen collegiate Level-I handball athletes volunteered for this study. Athletes were equally divided as control group and experimental group (EG). During the period of study, all athletes underwent the same handball specific training, but the EG received additional WBVT (amplitude: 2 mm, frequency: 20-40 Hz) three times per week for eight consecutive weeks. The vertical jump performance was evaluated according to the maximum height of squat jump (SJ) and countermovement jump (CMJ). The decuple jump performance was evaluated by the total distance covered in ten single leg long jumps. Single factor ANCOVA was used to examine the differences in each parameter between the groups after training with the pretest values as a covariate. The statistic significance was set at p<.05. After 8 weeks WBVT, the EG had significantly (p<.05) improved the maximal height of SJ (40.92±2.96 cm vs. 48.40±4.70 cm), the maximal height CMJ (47.25±7.48 cm vs. 52.20±6.25 cm), and the total distance of decuple jump (25.03±1.83 m vs. 26.26±1.65 m). From these results it is cleared that 8 weeks additional WBVT could improve the vertical and decuple jump performance in handball athletes. Enhanced motor unit synchronization and firing rates, facilitated muscular contraction stretch-shortening cycle, and improved lower extremity neuromuscular coordination could account for these enhancements.