Biomechanical Comparisons of Single- and Double-Legged Drop Jumps with Changes in Drop Height
Biomechanical Comparisons of Single- and Double-Legged Drop Jumps with Changes in Drop Height
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DOI：
10.1055/s-0033-1345133
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发表时间：
2014-06-01
影响因子：
2.5
通讯作者：
Peng, H. -T.
中科院分区：
文献类型：
--
作者：
Wang, L. -I.;Peng, H. -T.
这项研究的目的是比较单腿和双腿跳跃(SDJ和DDJ)的生物力学和下降高度的变化。对12名男大学生在20、30、40、50 cm高度的SDJ和20、40 cm高度的DDJ中的跳高、接触时间、反应强度指数、地面反作用力、地面反作用力负荷率、关节功率和刚度进行了测量。SDJ过程中，峰值冲击力随落体高度的增加而增大。SDJ30的跳跃高度、腿部和脚踝硬度均大于SDJ40和SDJ50。SDJ30的膝关节和髋关节刚度均大于SDJ50。SDJ30-50的冲击力大于DDJ40。SDJ20-30的腿、踝、膝和髋关节的刚度均大于DDJ20和DDJ40。SDJ20-50的推进力大于DDJ20和DDJ40。SDJ30的跳跃高度大于DDJ20。单腿跳高以30 cm为宜，生物力学效果最好。20-30 cm的单腿跳跃强度与40 cm的双腿跳跃强度相当。
The purpose of this study was to compare the biomechanics of single-and double-legged drop jumps (SDJ vs. DDJ) with changes in drop height. Jumping height, ground contact time, reactive strength index, ground reaction force, loading rate of ground reaction force, joint power and stiffness were measured in 12 male college students during SDJ from 20-, 30-, 40-, and 50-cm heights and DDJ from of 20- and 40-cm heights. The peak impact force was increased with the incremental drop height during SDJs. The jumping height and leg and ankle stiffness of SDJ30 were greater than those of SDJ40 and SDJ50. The knee and hip stiffnesses of SDJ30 were greater than those of SDJ50. The impact forces of SDJ30-50 were greater than those of DDJ40. The leg, ankle, knee and hip joint stiffnesses of SDJ20-30 were greater than those of DDJ20 and DDJ40. The propulsive forces of SDJ20-50 were greater than those of DDJ20 and DDJ40. The jumping height of SDJ30 was greater than that of DDJ20. Drop height of 30 cm was recommended during single-legged drop jump with the best biomechanical benefit. Single-legged drop jump from 20-30 cm could provide comparable intensity to double-legged drop jump from 40 cm.