Elasticity of baseball players’ posterior shoulder capsule during internal rotation stretching at 30 degrees of scaption
Elasticity of baseball players’ posterior shoulder capsule during internal rotation stretching at 30 degrees of scaption
复制标题
棒球运动员肩关节后囊在 30 度内旋拉伸时的弹性
DOI：
10.1002/tsm2.282
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发表时间：
2021
影响因子：
1.2
通讯作者：
Masaki Katayose
中科院分区：
文献类型：
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作者：
Naoya Iida;Keigo Taniguchi;Kazuya Saizaki;Shogo Soma;Hajime Toda;Masaki Katayose
以前的尸体研究已经确定了有效的拉伸位置后肩关节囊，但是，它是未知的，这些拉伸位置是否也有效的开销运动员。本研究的目的是调查是否被动张力产生的后肩关节囊在棒球运动员在拉伸位置在以前的尸体研究中确定。15名没有肩伤或手术史的男性棒球运动员参与了这项研究。我们使用超声剪切波弹性成像测量了静止（屈曲30度时的中性肩关节内旋/外旋）和伸展（肩胛平面抬高（scaption）30度时的最大肩关节内旋）位置的优势肩关节中后囊和下后囊的剪切模量。伸展位中后囊的剪切模量显著高于静息位（静息vs伸展：20.9 vs 34.6 kPa，P<0.001）;然而，下后囊两个位置之间的剪切模量无显著差异（22.3 vs 29.5 kPa，P= 0.120）。我们的研究结果显示，在肩关节内旋伸展30 °的头顶运动员，在中间后囊产生大量的被动张力。
Previous cadaveric studies have identified effective stretching positions for the posterior shoulder capsules; however, it is unknown whether these stretching positions are also effective in overhead athletes. This study aimed to investigate whether passive tension was generated in the posterior shoulder capsules in baseball players during stretching positions identified in previous cadaveric studies. Fifteen male baseball players without prior shoulder injuries or surgeries participated in this study. We measured the shear moduli of the middle and inferior posterior capsules of the dominant shoulder in the resting (neutral shoulder internal/external rotation at 30 degrees of flexion) and stretching (maximal shoulder internal rotation at 30 degrees of scapular plane elevation (scaption)) positions using ultrasound shear wave elastography. The shear moduli of the middle posterior capsule were significantly higher in the stretching position than in the resting position (resting vs stretching: 20.9 vs 34.6 kPa,P< .001); however, there was no significant difference in the shear moduli between both positions in the inferior posterior capsule (22.3 vs 29.5 kPa,P= .120). Our results revealed that a large amount of passive tension is generated in the middle posterior capsule during shoulder internal rotation stretching at 30 degrees of scaption in overhead athletes.