Niederer Daniel, Kalo Kristin, Vogel Johanna, Wilke Jan, Giesche Florian, Vogt Lutz, Banzer Winfried
Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany.
J Mot Behav. 2020;52(1):22-32. doi: 10.1080/00222895.2019.1570909. Epub 2019 Feb 7.
We tested if ACL-reconstructed participants show a decreased quadriceps torque, a lower muscle endurance capacity and a higher peak torque variability compared to unimpaired control participants prior to and following local muscle fatigue. Participants ( = 19, 10 women; 25 ± 5yrs.) with unilateral hamstrings autograft ACL-reconstruction and a matched unimpaired control group were recruited. Participants performed two maximal isometric voluntary force (MIVF) contractions of the knee extensors. In between, standardized local muscle fatigue was induced. ACL-reconstructed knees display a lower peak torque of the knee extensors in comparison to the contralateral limb (3.2 ± .3Nm/kg vs. 3.5 ± .3 Nm/kg). Peak torque variability and fatigue resistance were not affected by local muscle fatigue ( > .05). Participants with ACL-reconstructed knees show a persistent quadriceps muscle dysfunction. This dysfunction and lower limb side asymmetries might be risk factors for ACL re-ruptures.
我们测试了与未受损的对照组参与者相比，前交叉韧带重建的参与者在局部肌肉疲劳前后是否表现出股四头肌扭矩降低、肌肉耐力能力较低以及峰值扭矩变异性较高。招募了单侧自体腘绳肌腱前交叉韧带重建的参与者（n = 19，10名女性；25±5岁）和匹配的未受损对照组。参与者进行了两次膝关节伸肌的最大等长自主力量（MIVF）收缩。在此期间，诱导产生标准化的局部肌肉疲劳。与对侧肢体相比，前交叉韧带重建的膝关节显示出较低的膝关节伸肌峰值扭矩（3.2±0.3 Nm/kg对3.5±0.3 Nm/kg）。峰值扭矩变异性和抗疲劳能力不受局部肌肉疲劳的影响（P>0.05）。前交叉韧带重建膝关节的参与者表现出持续的股四头肌功能障碍。这种功能障碍和下肢侧不对称可能是前交叉韧带再次断裂的危险因素。
