Event-related Differences in the Cross-sectional Areas and Torque Generation Capabilities of Quadriceps Femoris and Hamstrings in Male High School Athletes
Event-related Differences in the Cross-sectional Areas and Torque Generation Capabilities of Quadriceps Femoris and Hamstrings in Male High School Athletes
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DOI：
10.2114/jpa2.29.13
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发表时间：
2010-01-01
影响因子：
3.1
通讯作者：
Kanehisa, Hiroaki
中科院分区：
文献类型：
--
作者：
Hoshikawa, Yoshihiro;Muramatsu, Masataka;Kanehisa, Hiroaki
本研究旨在探讨高中男子运动员股四头肌（QF）和腘绳肌（HAM）的横截面积（CSA）和扭矩产生能力的事件相关差异。研究对象为足球运动员（n=32）、排球运动员（21）、赛艇运动员（29）、空手道运动员（18）、相扑运动员（15）、短跑运动员（22）、投掷运动员（16）和非运动员（20）。使用磁共振成像确定大腿中部QF和HAM的CSA。此外，以预设速度1.05 rad/s确定膝关节伸展和屈曲期间的等速扭矩。两个肌肉群的CSA和两个动作中产生的扭矩分别与瘦体重的三分之二次方（LBM 2/3）和CSA与股骨长度的乘积（CSA*fl）显著相关，分别作为肌肉体积的指数计算。CSA相对于LBM 2/3的QF组之间没有差异，但HAM是更高的短跑运动员，足球运动员，投掷运动员，空手道运动员比相扑选手，赛艇运动员，排球运动员，和非运动员。空手道运动员、足球运动员和赛艇运动员的膝关节伸展扭矩相对于QF的CSA*fl高于非运动员，但各组之间的膝关节屈曲相应值没有差异。因此，本研究表明，至少在男性高中运动员中，LBM和QF和HAM的肌肉发达的事件相关差异产生相应的差异，在CSA的相互肌肉群和膝关节伸展和屈曲扭矩，分别。然而，与竞争和/或训练风格相关的特定配置文件存在于HAM CSA和膝关节伸展扭矩中，这不能分别用LBM和QF CSA的大小来解释。J Physiol Anthropol 29（1）：13-21，2010 http://www.jstage.jst.go.jp/browse/jpa2 [DOI：10.2114/jpa2.29.13]
This study investigated the event-related differences in the cross-sectional areas (CSAs) and torque generation capabilities of the quadriceps femoris (QF) and hamstrings (HAM) in male high school athletes. Subjects were soccer players (n=32), volleyball players (21), rowers (29), karate athletes (18), sumo wrestlers (15), sprinters (22), throwers (16), and nonathletes (20). The CSAs of QF and HAM at the mid-thigh were determined using magnetic resonance imaging. In addition, isokinetic torques during knee extension and flexion were determined at a pre-set velocity of 1.05 rad/s. The CSAs of the two muscle groups and torques developed in the two motions were significantly related to the two-third power of lean body mass (LBM2/3) and the product of CSA and femur length (CSA*fl), calculated as an index of muscle volume, respectively. CSA relative to LBM2/3 for QF did not differ among the groups, but that for HAM was higher in sprinters, soccer players, throwers, and karate athletes than in sumo wrestlers, rowers, volleyball players, and nonathletes. Knee extension torque relative to the CSA*fl of QF was higher in karate athletes, soccer players, and rowers than in nonathletes, but the corresponding value for knee flexion did not differ among groups. Thus, the present study indicated that, at least in male high school athletes, the event-related differences in LBM and the muscularity of QF and HAM produced the corresponding differences in the CSAs of the reciprocal muscle groups and knee extension and flexion torques, respectively. However, specific profiles related to competitive and/or training styles exist in HAM CSA and knee extension torque, which cannot be explained by the magnitude of LBM and QF CSA, respectively. J Physiol Anthropol 29(1): 13-21, 2010 http://www.jstage.jst.go.jp/browse/jpa2 [DOI: 10.2114/jpa2.29.13]