Xie Tianyuan, Crump Katherine B, Ni Renkun, Meyer Craig H, Hart Joseph M, Blemker Silvia S, Feng Xue
Springbok, Inc., Charlottesville, VA.
Department of Biomedical Engineering, University of Virginia, Charlottesville, VA; and.
J Strength Cond Res. 2020 Mar;34(3):623-631. doi: 10.1519/JSC.0000000000003421.
Xie, T, Crump, KB, Ni, R, Meyer, CH, Hart, JM, Blemker, SS, and Feng, X. Quantitative relationships between individual lower-limb muscle volumes and jump and sprint performances of basketball players. J Strength Cond Res 34(3): 623-631, 2020-Lower body skeletal muscles play an essential role in athletic performance; however, because of the difficulty in obtaining detailed information of each individual muscle, the quantitative relationships between individual muscle volumes and performance are not well studied. The aim of this study was to accurately measure individual muscle volumes and identify the muscles with strong correlations with jump and sprint performance metrics for basketball players. Ten male varsity basketball players and 8 club players were scanned using magnetic resonance imaging (MRI) and instructed to perform various jump and sprint tests. The volumes of all lower-limb muscles were calculated from MRI and normalized by body surface area to reduce the effect of the body size differences. In analysis, feature selection was first used to identify the most relevant muscles, followed by correlation analysis to quantify the relationships between the selected muscles and each performance metric. Vastus medialis and semimembranosus were found to be the most relevant muscles for jump while adductor longus and vastus medialis were selected for sprint. Strong correlations (r = 0.664-0.909) between the selected muscles and associated performance tests were found for varsity players, and moderate correlations (r = -0.203 to 0.635) were found for club players. One possible application is that for well-trained varsity players, a targeted training scheme focusing on the selected muscles may be an effective method to further improve jump and sprint performances.
谢，T、克伦普，KB、倪，R、迈耶，CH、哈特，JM、布莱姆克，SS和冯，X。篮球运动员个体下肢肌肉体积与跳跃和短跑成绩之间的定量关系。《力量与体能研究杂志》34(3): 623 - 631，2020年 - 下肢骨骼肌在运动表现中起着至关重要的作用；然而，由于难以获取每块肌肉的详细信息，个体肌肉体积与运动表现之间的定量关系尚未得到充分研究。本研究的目的是准确测量个体肌肉体积，并确定与篮球运动员跳跃和短跑成绩指标有强相关性的肌肉。对10名大学男子篮球校队队员和8名俱乐部球员进行了磁共振成像（MRI）扫描，并指导他们进行各种跳跃和短跑测试。从MRI计算出所有下肢肌肉的体积，并通过体表面积进行归一化处理，以减少身体大小差异的影响。在分析中，首先使用特征选择来识别最相关的肌肉，然后进行相关性分析，以量化所选肌肉与每个成绩指标之间的关系。发现股内侧肌和半膜肌是与跳跃最相关的肌肉，而长收肌和股内侧肌则被选用于短跑。在校队球员中，所选肌肉与相关成绩测试之间发现了强相关性（r = 0.664 - 0.909），而在俱乐部球员中发现了中等相关性（r = -0.203至0.635）。一个可能的应用是，对于训练有素的校队球员，针对所选肌肉的有针对性的训练方案可能是进一步提高跳跃和短跑成绩的有效方法。
