本研究是比較有氧舞蹈運動在高低衝擊時的撞擊力和街量。六位受試者做低衝擊左膝舉起(LFKL)和高街擊左膝舉起(HFKL)的動作各連續十次。資料的收集使用KISTLER9287的測力板，擷取頻率為1000。統計的方法是使用t 考驗的重覆量數分析來比較LFKL和HFKL的動力學參數是否有顯著差異。在準備期中最大撞擊力(PIF)的高街擊(2.18倍體重)大於低街擊( 1.55倍體重)和最大撞擊街量(PH)的高街擊(0.27體重*秒)大於低街擊( 0.19體 重*秒)。而著地期中被動街量(PI)的高衝擊(0.023體重*秒)大於低衝擊 ( 0.014體重*秒)。第一撞擊力量(FPIF)的高街擊( 2.02倍體重)大於低衝 擊(1.02倍體重)，第二撞擊力量(SPIF)的低衝擊(1.22倍體重)大於高街擊(0.92倍體重)。而且第一撞擊街量(FPII)的高街擊( 0.154體重*秒)大 於低衝擊(0.095體重*秒)與第二撞擊街量(SPII)的高街擊( 0.472體重*秒) 大於低街擊(0.393體重*秒) 依據以上，在垂直地面反作用力中的差異;低街擊左膝舉起(LFKL)的動作身體所承受的負荷比高街擊左膝舉起(HFKL)的動作小。作者建議在從事有氧舞蹈高街擊動作時，需考慮參與的運動時間和次數。

This study compared impact forces and impulses in a high and low impact aerobic dance movement. Six subjects each performed ten trials of the low impact front knee lift (LFKL) and ten trials of the high impact front knee lift (HFKL). The data were recorded by using a KISTLER 9287 force plate at 1000 Hz. A repeated-measures t-test was used to test the differences in selected variables for the LFKL and HFKL. The results indicated that the propulsion phase of peak impact force (PIF) was lower in the LFKL (1.55 Body Weights) than the HFKL (2.18BW). Peak impack impulse (PH) was lower in the LFKL (0.19 Body Weights*sec) than the HFKL(0.27 BW*s). Thelanding phase of passive impulse (PI) was lower in the LFKL(0.014 BW*s) than HFKL (0.023 BW*s). First peak impack force (FPIF) was lower in the LFKL (1.02BW) than the HFKL (2.02 BW). Second peak impack force (SPIF)was higher in the LFKL (1.22BW) than the HFKL(0.92 BW). First peak impack impulse(FPH) and second peak impack impulse (SPII) ) was lower in the LFKL (0.095 BW*s， 0.393 BW*s) than the HFKL (0.154 BW*s、0.472 BW*s). Based upon these differences in external ground reaction forces， it appears that low impact front knee lifts impose a significantly lower load than high impact front knee lifts. The authors suggest that when perform the HFKL， the participators should consider the duration and frequency of dance movement.