Husted Rasmus S, Bencke Jesper, Andersen Lars L, Myklebust Grethe, Kallemose Thomas, Lauridsen Hanne B, Hölmich Per, Aagaard Per, Zebis Mette K
Laboratory of Human Movement Analysis, Department of Orthopaedic Surgery, Copenhagen University Hospital, Amager-Hvidovre, Kettegård Alle 30, 2650 Hvidovre, Denmark; Clinical Research Centre, Copenhagen University Hospital, Amager-Hvidovre, Kettegård Alle 30, 2650 Hvidovre, Denmark.
Laboratory of Human Movement Analysis, Department of Orthopaedic Surgery, Copenhagen University Hospital, Amager-Hvidovre, Kettegård Alle 30, 2650 Hvidovre, Denmark.
Knee. 2016 Jun;23(3):362-6. doi: 10.1016/j.knee.2016.02.004. Epub 2016 Mar 2.
Reduced ability to activate the medial hamstring muscles during a sports-specific sidecutting movement has been found to be a potential risk factor for non-contact ACL injury. However, whether a reduced ability to activate the medial hamstring muscle is a general neuromuscular phenomenon and thereby observable independently of the type of clinical screening tests used is not known. This cross sectional study investigated the rank correlation of knee joint neuromuscular activity between three different ACL injury risk screening tests.
Sixty-two adolescent female elite football and handball players (16.7±1.3years) participated in the study. Using surface electromyography (EMG) assessment, the neuromuscular activity of medial hamstring muscle (semitendinosus, ST), lateral hamstring muscle (biceps femoris, BF) and quadriceps muscle (vastus lateralis, VL) were monitored during three standardized screening tests - i.e. one-legged horizontal hop (OLH), drop vertical jump (DJ) and sidecutting (SC). Neuromuscular pre-activity was measured in the time interval 10ms prior to initial contact on a force plate.
For neuromuscular hamstring muscle pre-activity, correlation analysis (Spearman correlation coefficient) showed low-to-moderate correlations between SC and 1) DJ (rs=0.34-0.36, P<0.05) and 2) OLH (rs=0.40-0.41, P<0.05), respectively.
In conclusion, the present data suggest that hamstring pre-activity share some common variance during the examined tests. However, a lack of strong correlation suggests that we cannot generalize one risk factor during one test to another test.
The present data demonstrate that one-legged horizontal hop and drop vertical jump testing that are commonly used in the clinical setting does not resemble the specific neuromuscular activity patterns known to exist during sidecutting, a well known high risk movement for non-contact ACL injury.
研究发现，在特定运动的侧切动作中，激活腘绳肌内侧肌肉的能力下降是非接触性前交叉韧带损伤的一个潜在风险因素。然而，激活腘绳肌内侧肌肉的能力下降是否是一种普遍的神经肌肉现象，因此是否可以独立于所使用的临床筛查测试类型而被观察到，目前尚不清楚。这项横断面研究调查了三种不同的前交叉韧带损伤风险筛查测试之间膝关节神经肌肉活动的等级相关性。
62名青少年女子精英足球和手球运动员（16.7±1.3岁）参与了该研究。使用表面肌电图（EMG）评估，在三种标准化筛查测试期间监测腘绳肌内侧肌肉（半腱肌，ST）、腘绳肌外侧肌肉（股二头肌，BF）和股四头肌（股外侧肌，VL）的神经肌肉活动，这三种测试分别为单腿水平跳（OLH）、垂直跳（DJ）和侧切（SC）。在力板上初始接触前10毫秒的时间间隔内测量神经肌肉预激活。
对于神经肌肉腘绳肌预激活，相关性分析（Spearman相关系数）显示，SC与1）DJ（rs=0.34 - 0.36，P<0.05）和2）OLH（rs=0.40 - 0.41，P<0.05）之间分别存在低到中度的相关性。
总之，目前的数据表明，在检查的测试中，腘绳肌预激活存在一些共同的变化。然而，缺乏强相关性表明，我们不能将一项测试中的一个风险因素推广到另一项测试中。
目前的数据表明，临床环境中常用的单腿水平跳和垂直跳测试与侧切过程中已知存在的特定神经肌肉活动模式不同，侧切是一种众所周知的非接触性前交叉韧带损伤的高风险动作。
