Capital University of Physical Education and Sports, 100191 Beijing, China.
Hebei Institute of Sports Science, 050011 Shijiazhuang Hebei, China.
Comput Math Methods Med. 2022 Aug 16;2022:8572311. doi: 10.1155/2022/8572311. eCollection 2022.
This study establishes the shoulder model on the drawing side of recurve archers by the finite element method and finds out the stress changes on the rotator cuff muscles in the position of the humerus and scapula under different stages of special techniques. The aim of this study is to investigate the mechanism of rotator cuff damage on a recurve archer's drawing arm.
A 22-year-old healthy male's shoulder CT and MRI data were collected, and the drawing side shoulder joint finite element model was constructed, which contains the structure of the shoulder blades, clavicle, humerus, supraspinatus, infraspinatus, teres minor, and subscapularis. The humerus on the drawing arm was simulated to raising the bow, drawing, holding, and releasing on the scapula plane, and stress changes in rotator cuff muscles are analyzed.
The peak stress on the infraspinatus increased slowly, and from the start of raising the bow to hold and release, the stress peak increased from 0.007 MPa to 0.009 MPa. The peak stress on teres minor rises slowly from 0.003 MPa at the start of raising the bow to 0.010 MPa at the moment of releasing. The peak stress in the subscapularis increased from 0.096 MPa to 0.163 MPa between the start of raising the bow and releasing. The peak stress on the supraspinatus varied greatly, and from the start of raising the bow to the start of drawing, the stress peak increased markedly from 1.159 MPa to 1.395 MPa. Subsequently, the stress peak immediately decreased to 1.257 MPa at the start of holding and then increased to 1.532 MPa at releasing.
The position of the humerus and scapula would change with the different stages of special techniques. It causes stress changes in the rotator cuff muscles, and when the stress accumulates over time, the shoulder 5on the drawing side will gradually become injured and dysfunctional. In combination with the depth of the structural site and the surrounding structural features, corrective exercises can be used to prevent injury to the rotator cuff muscles.
本研究通过有限元方法建立了反曲弓射手拉弓侧肩部模型，得出了在不同专项技术阶段肱骨和肩胛骨位置下肩袖肌群的应力变化。本研究旨在探讨反曲弓射手拉弓臂肩袖损伤的机制。
收集了一名 22 岁健康男性的肩部 CT 和 MRI 数据，并构建了拉弓侧肩关节有限元模型，该模型包含肩胛骨、锁骨、肱骨、冈上肌、冈下肌、小圆肌和肩胛下肌的结构。模拟拉弓臂肱骨在肩胛骨平面上的举弓、拉弓、持弓和释放动作，分析肩袖肌群的应力变化。
冈下肌的峰值应力缓慢增加，从举弓开始到持弓和释放，应力峰值从 0.007 MPa 增加到 0.009 MPa。小圆肌的峰值应力从举弓开始的 0.003 MPa 缓慢上升到释放时的 0.010 MPa。肩胛下肌的峰值应力从举弓开始到释放时从 0.096 MPa 增加到 0.163 MPa。冈上肌的峰值应力变化较大，从举弓开始到拉弓开始，应力峰值从 1.159 MPa 显著增加到 1.395 MPa。随后，在持弓开始时，应力峰值立即下降到 1.257 MPa，然后在释放时增加到 1.532 MPa。
肱骨和肩胛骨的位置会随着专项技术的不同阶段而改变。这会导致肩袖肌群的应力变化，随着时间的推移，累积的应力会导致拉弓侧肩部逐渐受伤和功能障碍。结合结构部位的深度和周围结构特征，可以使用矫正运动来预防肩袖肌群受伤。
