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Isokinetic Performance of Shoulder External and Internal Rotators of Professional Volleyball Athletes by Different Positions.
Scientific Reports ( IF 4.6 ) Pub Date : 2020-05-26 , DOI: 10.1038/s41598-020-65630-9
Do-Kyung Kim,Geon Park,Liang-Tseng Kuo,Won-Hah Park

This study aimed to exam the isokinetic shoulder rotator strength of professional volleyball athletes, by playing positions. This cross-sectional study included a total of 49 healthy male professional volleyball players. We measured the isokinetic strength of the external rotator (ER) and internal rotator (IR) muscles and compared the dominant and non-dominant shoulders at angular speeds of 60°/s and 180°/s. In ER, all positions of players had similar strength between the dominant shoulder and non-dominant shoulders. Conversely, all playing positions except libero had stronger strength in dominant shoulder than that in the non-dominant shoulder. The ER/IR ratio in the dominant shoulder was significantly lower only for the attacker (outside hitter and opposite) at 60°/s and 180°/s (P < 0.0001; P = 0.0028 respectively) and blocker at 60°/s (P = 0.0273) when compared with non-dominant shoulder. Furthermore, the attacker had a lower ER/IR ratio in the dominant shoulder than setter and libero at 60°/s and 180°/s. For elite volleyball players without injury, the dominant shoulder had a higher strength of internal rotation, causing the relative muscle imbalance than the non-dominant shoulder, especially for the attacker and blocker positions. Training program should be individualized for each playing position to improve the imbalanced shoulder.



中文翻译:

不同位置专业排球运动员肩部内外旋肌的等速运动性能。

这项研究旨在通过打球的姿势来检验专业排球运动员的等速肩旋转肌力量。这项横断面研究包括总共49位健康的男性职业排球运动员。我们测量了外旋肌(ER)和内旋肌(IR)的等速肌力,并比较了在60°/ s和180°/ s角速度下的主要和非主要肩膀。在ER中,运动员的所有位置在主要肩膀和非主要肩膀之间具有相似的力量。相反,除libero以外的所有演奏位置在主导肩膀上的力量都强于非主导肩膀。仅对于进攻者(外击手和对位),在60°/ s和180°/ s时,显性肩部的ER / IR比显着降低(分别为P <0.0001; P = 0.0028)和在60°/ s时的阻挡者( P = 0。0273)与不占主导地位的肩膀相比。此外,在60°/ s和180°/ s时,攻击者的主要肩部ER / IR比setter和libero低。对于没有受伤的精英排球运动员,显性肩部具有更高的内旋强度,与非显性肩部相比,会引起相对的肌肉失衡,尤其是对于进攻者和盖帽手。每个演奏位置的训练计划都应个性化,以改善肩膀不平衡的情况。特别是对于攻击者和封锁者的位置。每个演奏位置的训练计划都应个性化,以改善肩膀不平衡的情况。特别是对于攻击者和封锁者的位置。每个演奏位置的训练计划都应个性化,以改善肩膀不平衡的情况。

更新日期:2020-05-26
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