Tottori Nobuaki, Suga Tadashi, Miyake Yuto, Tsuchikane Ryo, Tanaka Takahiro, Terada Masafumi, Otsuka Mitsuo, Nagano Akinori, Fujita Satoshi, Isaka Tadao
Research Organization of Science and Technology, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, 525-8577, Shiga, Japan.
Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga, 525-8577, Japan.
BMC Res Notes. 2021 Feb 25;14(1):74. doi: 10.1186/s13104-021-05487-x.
The major purpose of this study was to determine the specific muscle(s) for superior sprint performance in sprinters. The cross sectional areas (CSAs) of ten muscles of the trunk and lower limb were measured using magnetic resonance images in 56 male sprinters and 40 male non-sprinters. In addition to the absolute CSA, to minimize the effect of difference in body size among participants, the relative CSA normalized to body mass was used for analysis of this study.
Absolute and relative CSAs of most trunk and lower limb muscles, including the psoas major (PM) and gluteus maximus (GM), were significantly larger in sprinters than in non-sprinters (all P < 0.001, d = 0.91 to 1.82). The absolute and relative CSAs of the PM and GM correlated significantly with personal best 100-m sprint time in sprinters (r = - 0.363 to - 0.388, all P < 0.01). A stepwise multiple regression analysis revealed that both CSAs of absolute PM and relative GM were predictive variables for the personal best 100 m sprint time in sprinters (β = - 0.289 and - 0.287, respectively, both P < 0.05). These findings suggest that the PM and GM may be specific muscles for superior sprint performance in sprinters.
本研究的主要目的是确定短跑运动员实现卓越短跑成绩的特定肌肉。使用磁共振成像测量了56名男性短跑运动员和40名男性非短跑运动员躯干和下肢10块肌肉的横截面积（CSA）。除了绝对CSA外，为了尽量减少参与者之间体型差异的影响，本研究采用了归一化至体重的相对CSA进行分析。
大多数躯干和下肢肌肉的绝对和相对CSA，包括腰大肌（PM）和臀大肌（GM），短跑运动员均显著大于非短跑运动员（所有P<0.001，d=0.91至1.82）。短跑运动员中，PM和GM的绝对和相对CSA与个人最佳100米短跑时间显著相关（r=-0.363至-0.388，所有P<0.01）。逐步多元回归分析显示，绝对PM和相对GM的CSA均为短跑运动员个人最佳100米短跑时间的预测变量（β分别为-0.289和-0.287，均P<0.05）。这些发现表明，PM和GM可能是短跑运动员实现卓越短跑成绩的特定肌肉。
