Life Sciences, University of the West of Scotland, Paisley, United Kingdom of Great Britain and Northern Ireland.
Computing Engineering and Physical Sciences, University of the West of Scotland, Paisley, United Kingdom of Great Britain and Northern Ireland.
Res Sports Med. 2021 May-Jun;29(3):240-253. doi: 10.1080/15438627.2020.1771336. Epub 2020 Jul 6.
Isokinetic strength screening is utilized in professional soccer. However, there has been little research on the interaction between seasonal changes in players' peak torque (PT) and injury incidence. Twenty-five (age 16.50.68 years) professional youth soccer players participated in the study. Bilateral isokinetic concentric (CON) and eccentric (ECC) testing of Quadriceps (Q) and Hamstrings (H) were conducted at three time-points across the season. Absolute CON and ECC PT were measured at 60 degree/sec and in a supine 170-degree position. Testing data was normalized to body mass. A mixed design (2 by 3) repeated measures ANOVA with injury as a co-variate was conducted to evaluate the effect of season and/or limb dominance on PT and injury incidence. With regard to the seasonal variation and injury incidence, an interaction was identified with respect to non-dominant limb (NDL) QCON (p = 0.01) and to a lesser extent the dominant limb (DL) QCON (p = 0.05). The seasonal variation of the PT of the NDL QCON was different between the injured and non-injured individuals. Non-injured individuals, QCON strength increased over the course of the season. While for the Injured players, QCON declined from pre-season to mid-season then increased but never recovered to starting pre-season values.
等速肌力筛选被用于职业足球领域。然而，关于球员峰值力矩（PT）的季节性变化与受伤发生率之间的相互关系，研究甚少。25 名（年龄 16.50.68 岁）职业青年足球运动员参与了这项研究。在赛季中三个时间点对双侧股四头肌（Q）和腘绳肌（H）进行等速向心（CON）和离心（ECC）测试。在 60 度/秒和仰卧 170 度的位置测量绝对 CON 和 ECC PT。测试数据按体重归一化。采用混合设计（2 乘 3）重复测量方差分析，将受伤作为协变量，评估季节和/或肢体优势对 PT 和受伤发生率的影响。关于季节性变化和受伤发生率，非优势肢体（NDL）QCON 的季节变化与受伤（p = 0.01）和优势肢体（DL）QCON 的受伤（p = 0.05）之间存在交互作用。NDL QCON 的 PT 季节性变化在受伤和未受伤个体之间存在差异。未受伤个体的 QCON 力量随着赛季的进行而增加。而对于受伤运动员，QCON 从赛季前半段到赛季中期下降，然后增加，但从未恢复到赛季前的起始值。
