PDF(Pubmed)
Abstract：
Background and Objectives: The COVID-19 confinement significantly impacted the physical condition of athletes. However, the detraining impacts of this period on the shoulder rotator and range of motion in handball players have not been studied. Thus, the main aim of this study was to investigate the effect of this 11-week detraining period, imposed by the COVID-19 pandemic confinement, on the shoulder rotator isokinetic profile (peak torque, ratio, fatigue index), shoulder rotator and flexion range of motion, and ball release velocity in handball players. Materials and Methods: A total of 16 handball players, with a mean age of 22.38 (5.28) years, participated in this study. The isokinetic strength was assessed using two protocols (three repetitions at an angular velocity of 60°/s and 20 repetitions at an angular velocity of 180°/s). In addition, the range of motion and ball release (at jump and standing shots) were measured. All these measurements were assessed before and after the COVID-19 confinement. Results: The results showed a significant reduction in the peak torque of the external rotation of their dominant and non-dominant shoulders. In addition, confinement significantly increased the fatigue index of external rotation and internal rotation and reduced the range of motion of internal rotation. Additionally, the ball release velocity during standing and jump shots was significantly reduced. Conclusions: These results suggested that strengthening external and internal rotation as well as recovering the internal rotation range of motion may be necessary after a detraining period in order to prevent shoulder injuries.
摘要：
背景与目的：COVID-19禁闭对运动员的身体状况有显著影响。然而,这一时期对手球运动员肩部旋转器和运动范围的去训练影响尚未研究。因此，这项研究的主要目的是调查这11周的去训练期的影响，由COVID-19大流行的禁闭所施加，在肩部旋转器等速剖面上(峰值扭矩，比率，疲劳指数)，肩关节和屈曲运动范围，和手球运动员的球释放速度。材料与方法:共有16名手球运动员,平均年龄22.38（5.28）岁，参与了这项研究。使用两个方案(在60°/s的角速度下重复三次和在180°/s的角速度下重复20次)评估等速强度。此外,测量了运动范围和球释放（跳跃和站立射击时）。所有这些测量都在COVID-19禁闭前后进行了评估。结果：结果表明，它们的优势和非优势肩的外部旋转的峰值扭矩显着降低。此外,约束显着增加了外部旋转和内部旋转的疲劳指数，并减小了内部旋转的运动范围。此外,站立和跳投过程中的球释放速度显着降低。结论：这些结果表明，为了防止肩部受伤，在训练期后可能需要加强内旋和内旋以及恢复内旋运动范围。
