Keogh Joshua A J, Ruder Matthew C, Masood Zaryan, Kobsar Dylan
Kinesiology, McMaster University Faculty of Science, Hamilton, Canada.
Sports Med Int Open. 2022 Nov 4;6(2):E53-E59. doi: 10.1055/a-1947-4848. eCollection 2022 Dec.
Jump-based asymmetry is often used as an indicator of sport performance and may be used to discern injury susceptibility. Due to task specificity, however, countermovement jump asymmetry may not be representative of on-court asymmetry. As such, we assessed the association between countermovement jump asymmetry and on-court impact asymmetry metrics (n=3, and n=4, respectively) using linear regressions (α=0.05). Fifteen female basketball athletes completed countermovement jump and on-court sessions across a competitive season. A significant negative association was found between peak landing force asymmetry and both overall and medium acceleration on-court asymmetry (b=-0.1, R =0.08, p<0.001; b=-0.1, R =0.11, p<0.001, respectively), as well as between peak propulsive force asymmetry and on-court medium acceleration asymmetry (b=-0.24, R =0.04, p=0.01). Alternatively, both peak landing and peak propulsive force asymmetry were significantly positively associated with on-court high acceleration asymmetry (b=0.17, R =0.08, p<0.001; b=0.35, R =0.02, p=0.04, respectively). While some overlap may exist, countermovement jump and on-court impact asymmetry appear to be independent. Thus, sport-specific monitoring may be necessary to adequately monitor injury susceptibility using asymmetry.
基于跳跃的不对称性常被用作运动表现的指标,也可用于辨别受伤易感性。然而,由于任务的特异性,反向移动跳跃不对称性可能无法代表场上的不对称性。因此,我们使用线性回归(α=0.05)评估了反向移动跳跃不对称性与场上冲击不对称性指标之间的关联(分别为n=3和n=4)。15名女子篮球运动员在一个赛季的比赛中完成了反向移动跳跃和场上训练。研究发现,峰值着陆力不对称性与整体和中等加速度的场上不对称性之间存在显著负相关(b=-0.1,R =0.08,p<0.001;b=-0.1,R =0.11,p<0.001),峰值推进力不对称性与场上中等加速度不对称性之间也存在显著负相关(b=-0.24,R =0.04,p=0.01)。另外,峰值着陆力不对称性和峰值推进力不对称性均与场上高加速度不对称性存在显著正相关(分别为b=0.17,R =0.08,p<0.001;b=0.35,R =0.02,p=0.04)。虽然可能存在一些重叠,但反向移动跳跃和场上冲击不对称性似乎是相互独立的。因此,可能需要进行特定运动的监测,以便利用不对称性充分监测受伤易感性。