Kadlec Daniel, Jordan Matthew J, Alderson Jacqueline, Nimphius Sophia
School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia.
Faculty of Kinesiology, Sport Medicine Centre, University of Calgary, Calgary, Canada; and.
J Strength Cond Res. 2024 Dec 1;38(12):2079-2087. doi: 10.1519/JSC.0000000000004923. Epub 2024 Aug 14.
Kadlec, D, Jordan, MJ, Alderson, J, and Nimphius, S. Examining the effects of dynamic and isometric resistance training on knee joint kinetics during unplanned sidesteps in elite female athletes. J Strength Cond Res 38(12): 2079-2087, 2024-The purpose of this study was to examine the effects of a 4-week block of isometric (isometric RT ) and dynamic resistance training (dynamic RT ) on kinetic variables associated with anterior cruciate ligament (ACL) injury risk during unplanned sidesteps in elite female athletes. Twenty-one elite female athletes competing for a women's international rugby union team were recruited with 15 ( n = 15; age: 23.4 ± 4.7 years; 170.7 ± 8.4 cm; 84.4 ± 15.4 kg) completing assessment of knee flexion moment, knee valgus moment (KVM), knee internal rotation moment (KIRM), knee joint power during unplanned sidesteps, and lower limb strength before and after a 4-week intervention. Linear mixed effects models and one-dimensional statistical parametric mapping assessed the effect of the interventions. Statistical significance was set at α = 0.05. Postintervention the isometric RT group revealed reduced peak KVM during early stance ( p = 0.04) while the dynamic RT group decreased peak KIRM ( p < 0.01) and KIRM over 8.8-86.6% ( p < 0.01) and 96.9-98.5% ( p = 0.047). An exploratory combined group analysis revealed reductions in KVM over 7.9-21.8% ( p = 0.002) and in KIRM over 8.3-90.5% ( p < 0.01) and 96.2-98.5% ( p = 0.046). Most lower limb isometric and dynamic strength measures increased after both resistance training interventions. Overall, both groups increased lower-body maximum strength while reducing kinetic knee joint variables associated with ACL injury risk during unplanned sidesteps. These results highlight the importance of increasing single-joint and multijoint strength in female athletes to mitigate the mechanical knee joint demands during sidestepping.
卡德莱茨、D、乔丹、MJ、奥尔德森、J和宁菲厄斯、S。研究动态和等长阻力训练对精英女运动员非计划侧步时膝关节动力学的影响。《力量与体能研究杂志》38(12): 2079 - 2087, 2024 - 本研究的目的是考察为期4周的等长（等长阻力训练）和动态阻力训练（动态阻力训练）对精英女运动员非计划侧步时与前交叉韧带（ACL）损伤风险相关的动力学变量的影响。招募了21名参加女子国际橄榄球联盟球队比赛的精英女运动员，其中15名（n = 15；年龄：23.4±4.7岁；身高170.7±8.4厘米；体重84.4±15.4千克）在为期4周的干预前后完成了膝关节屈曲力矩、膝关节外翻力矩（KVM）、膝关节内旋力矩（KIRM）、非计划侧步时的膝关节功率以及下肢力量的评估。线性混合效应模型和一维统计参数映射评估了干预的效果。统计学显著性设定为α = 0.05。干预后，等长阻力训练组在早期支撑期的KVM峰值降低（p = 0.04），而动态阻力训练组的KIRM峰值降低（p < 0.01），KIRM在8.8 - 86.6%（p < 0.01）和96.9 - 98.5%（p = 0.047）范围内降低。一项探索性联合组分析显示，KVM降低了7.9 - 21.8%（p = 0.002），KIRM降低了8.3 - 90.5%（p < 0.01）和96.2 - 98.5%（p = 0.046）。两种阻力训练干预后，大多数下肢等长和动态力量指标均有所增加。总体而言，两组在增加下肢最大力量的同时，降低了非计划侧步时与ACL损伤风险相关的膝关节动力学变量。这些结果凸显了提高女运动员单关节和多关节力量对于减轻侧步时膝关节机械需求的重要性。
