PDF(Pubmed)
Abstract：
This study investigated the effects of plyometric training on lower-limb muscle strength and knee biomechanical characteristics during the landing phase. Twenty-four male subjects were recruited for this study with a randomised controlled design. They were randomly divided into a plyometric training group and a traditional training group and underwent training for 16 weeks. Each subject was evaluated every 8 weeks for knee and hip isokinetic muscle strength as well as knee kinematics and kinetics during landing. The results indicated significant group and time interaction effects for knee extension strength (F = 74.942 and p = 0.001), hip extension strength (F = 99.763 and p = 0.000) and hip flexion strength (F = 182.922 and p = 0.000). For landing kinematics, there were significant group main effects for knee flexion angle range (F = 4.429 and p = 0.047), significant time main effects for valgus angle (F = 6.502 and p = 0.011) and significant group and time interaction effects for internal rotation angle range (F = 5.475 and p = 0.008). The group main effect for maximum knee flexion angle was significant (F = 7.534 and p = 0.012), and the group and time interaction effect for maximum internal rotation angle was significant (F = 15.737 and p = 0.001). For landing kinetics, the group main effect of the loading rate was significant (F = 4.576 and p = 0.044). Significant group and time interaction effects were observed for knee extension moment at the moment of maximum vertical ground reaction force (F = 5.095 and p = 0.010) and for abduction moment (F = 8.250 and p = 0.001). These findings suggest that plyometric training leads to greater improvements in hip and knee muscle strength and beneficial changes in knee biomechanics during landing compared to traditional training.
摘要：
这项研究调查了在着陆阶段，增容训练对下肢肌肉力量和膝关节生物力学特征的影响。本研究采用随机对照设计招募了24名男性受试者。他们被随机分为增度训练组和传统训练组，并接受了16周的训练。每8周评估每个受试者的膝盖和髋部等速肌力以及着陆时的膝盖运动学和动力学。结果表明，膝关节伸展强度具有显著的群体和时间交互作用(F=74.942和p=0.001)，髋关节伸展强度（F=99.763和p=0.000）和髋关节屈曲强度（F=182.922和p=0.000）。对于着陆运动学，膝关节屈曲角度范围有显着的组主要影响（F=4.429和p=0.047），外翻角度的显着时间主效应（F=6.502和p=0.011），内旋角度范围的显着群体和时间交互作用（F=5.475和p=0.008）。最大膝关节屈曲角度组主效应显著(F=7.534,p=0.012),最大内旋角度组与时间交互作用显著(F=15.737,p=0.001)。对于着陆动力学，负荷率的组主效应显著(F=4.576,p=0.044)。在最大垂直地面反作用力（F=5.095和p=0.010）和外展力矩（F=8.250和p=0.001）时，膝关节伸展力矩观察到显着的群体和时间交互作用。这些发现表明，与传统训练相比，在着陆过程中，柔度训练可带来更大的髋关节和膝关节肌肉力量的改善以及膝关节生物力学的有益变化。
