Inferior Muscularity of the Rectus Femoris to Vasti in Varsity Oarsmen
Inferior Muscularity of the Rectus Femoris to Vasti in Varsity Oarsmen
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DOI：
10.1055/s-0033-1349138
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发表时间：
2014-04-01
影响因子：
2.5
通讯作者：
Kawakami, Y.
中科院分区：
文献类型：
--
作者：
Ema, R.;Wakahara, T.;Kawakami, Y.
本研究旨在探讨划船运动员股四头肌四个组成部分（股外侧肌、股内侧肌、股中间肌和股直肌）的形态学特征，并与非运动员进行比较。对14名赛艇运动员和19名非运动员的大腿进行了T1加权磁共振（MR）成像。从磁共振图像，序列解剖横截面积（ACSA）和肌肉体积的每块肌肉被确定。总股四头肌，股外侧肌，股内侧肌和股中间肌的肌肉体积显着大于在非运动员男性，而股直肌是可比的两组。股直肌占股四头肌总体积的百分比在非运动员男性中显著高于划桨运动员，股外侧肌则相反。两组之间每块肌肉的近端-远端和中端-远端阿克萨比率没有差异。目前的研究结果表明，下肌肉肥大的股直肌相比，在赛艇运动员的股，股是同样肥大的沿着他们的长度。这可能是由于肌肉特定的适应划船运动。
The purpose of this study was to examine the morphological profiles of 4 constituents (vastus lateralis, vastus medialis, vastus intermedius and rectus femoris) of the quadriceps femoris in oarsmen through comparison with non-athletes. T1-weigheted magnetic resonance (MR) images of the thigh were obtained from 14 oarsmen and 19 non-athlete men. From the MR images, serial anatomical cross-sectional areas (ACSAs) and muscle volume of each muscle were determined. The muscle volume of the total quadriceps femoris, vastus lateralis, vastus medialis and vastus intermedius were significantly larger in the oarsmen than in the non-athlete men, whereas that of the rectus femoris was comparable for the 2 groups. The portion of the rectus femoris as a percentage of total quadriceps femoris volume was significantly higher in the non-athlete men than in the oarsmen, and vice versa for the vastus lateralis. The proximal-to-distal and middle-to-distal ACSA ratios in each muscle did not differ between the 2 groups. The present results indicate inferior muscular hypertrophy of the rectus femoris compared to the vasti in oarsmen, and that the vasti are equally hypertrophied along their lengths. This may be due to muscle-specific adaptation to the rowing exercise.