High elasticity of the flexor carpi ulnaris and pronator teres muscles is associated with medial elbow injuries in youth baseball players
High elasticity of the flexor carpi ulnaris and pronator teres muscles is associated with medial elbow injuries in youth baseball players
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尺侧腕屈肌和旋前圆肌的高弹性与青少年棒球运动员肘内侧损伤有关
DOI：
10.1080/00913847.2021.1954861
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Kamada Tetsuaki
中科院分区：
文献类型：
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作者：
Saito Akira;Okada Kyoji;Shibata Kazuyuki;Sato Hiromichi;Kamada Tetsuaki
本研究的目的是测量青少年棒球运动员前臂屈旋前肌的弹性，并探讨其与肘部内侧损伤的关系。方法检测89名青少年棒球运动员(损伤组)和142名健康棒球运动员(对照组)的指浅屈肌(FDS)、尺侧腕屈肌(FCU)和旋前圆肌(PT)的应变比(SR)。采用超声应变弹性成像技术测定肌肉弹性指数。损伤组与对照组比较各肌肉的肌力，组内比较双侧臂的肌力。结果损伤组投掷臂FCU和PT的SR均显著高于对照组(P均<0.01)。在损伤组，投掷臂FCU的SR高于非投掷臂(P<；0.001)，而PT则无明显差异。多因素Logistic回归分析显示，投掷臂FCU的SR(优势比[OR]1.30，95%可信区间[CI]1.14~1.48)和投掷臂的PT(OR 1.41，95%CI 1.19~1.67)和非投掷臂的PT(OR 1.31，95%CI 1.12~1.54)增加0.1与肘内侧部损伤的发生率显著相关。结论肘部内侧损伤患者投掷臂的FCU和双臂PT具有高弹性，并与肘部内侧损伤的发生率增加有关。这些发现可能是年轻棒球运动员肘部内侧损伤的特征。
ObjectivesThe purpose of the present study was to measure the elasticities of the forearm flexor-pronator muscles in youth baseball players and examine their relationships with medial elbow injuries.MethodsWe examined the strain ratios (SR) of the flexor digitorum superficialis (FDS), flexor carpi ulnaris (FCU), and pronator teres (PT) in 89 youth baseball players with medial epicondylar fragmentation (injury group) and in 142 healthy baseball players (control group). An index of muscle elasticity was determined using ultrasound strain elastography. The SR of each muscles was compared between the injury and control groups, and the SR of the both side arms was compared within group. Moreover, multivariable logistic regression analyses were conducted to examine the association of forearm muscle elasticity with medial elbow injuries.ResultsThe SR of the FCU and PT of the throwing arm were significantly higher in the injury group than in the control group (bothP< .001). In the injury group, the SR of the FCU was higher in the throwing arm than in the non-throwing arm (P< .001), but no difference was noted for the PT. Multivariable logistic regression analyses showed that a 0.1 increase of the SR of the FCU of the throwing arm (odds ratio [OR] 1.30, 95% confidence interval [CI] 1.14–1.48) and PT of the throwing arm (OR 1.41, 95% CI 1.19–1.67) and the non-throwing arm (OR 1.31, 95% CI 1.12–1.54) was significantly associated with an increased prevalence of medial elbow injuries.ConclusionHigh elasticities of the FCU of the throwing arm and PT of both the arms were observed in individuals with medial elbow injuries, and were associated with increased prevalence of medial elbow injuries. These findings may be characteristic of medial elbow injuries in youth baseball players.