Schmitz Randy J, Kulas Anthony S, Shultz Sandra J, Waxman Justin P, Wang Hsin-Min, Kraft Robert A
The University of North Carolina at Greensboro, Greensboro, NC, United States.
East Carolina University, Greenville, NC, United States.
Knee. 2017 Dec;24(6):1335-1341. doi: 10.1016/j.knee.2017.09.006. Epub 2017 Sep 30.
Greater posterior-inferior directed slope of the lateral tibial plateau (LTS) has been demonstrated to be a prospective ACL injury risk factor. Trainable measures to overcome a greater LTS need to be identified for optimizing injury prevention protocols. It was hypothesized that Healthy individuals with greater LTS who have not sustained an ACL injury would have a larger lateral hamstring volume.
Eleven healthy females (mean +/- standard deviation) (1.63±0.07m, 62.0±8.9kg, 22.6±2.9years) & 10 healthy males (1.80±0.08m, 82.3±12.0kg, 23.2±3.4years) underwent magnetic resonance imaging of the left knee and thigh. LTS, semitendinosus muscle volume, and biceps femoris long head muscle volume were obtained from imaging data.
After controlling for potential sex confounds (R=.00; P=.862), lesser semitendinosus volume and greater biceps femoris-long head volume were indicative of greater LTS (R∆=.30, P=.008).
Healthy individuals with greater LTS have a muscular morphologic profile that includes a larger biceps femoris-long head volume. This may be indicative of a biomechanical strategy that relies more heavily on force generation of the lateral hamstring and is less reliant on force generation of the medial hamstring.
Level IV.
胫骨外侧平台（LTS）更大的后下倾斜度已被证明是前交叉韧带（ACL）损伤的一个潜在危险因素。需要确定可训练的措施来克服更大的LTS，以优化损伤预防方案。研究假设是，未发生ACL损伤但LTS较大的健康个体，其股二头肌外侧头体积会更大。
11名健康女性（平均±标准差）（身高1.63±0.07米，体重62.0±8.9千克，年龄22.6±2.9岁）和10名健康男性（身高1.80±0.08米，体重82.3±12.0千克，年龄23.2±3.4岁）接受了左膝和大腿的磁共振成像检查。从成像数据中获取LTS、半腱肌体积和股二头肌长头肌肉体积。
在控制潜在的性别混杂因素后（R = 0.00；P = 0.862），较小的半腱肌体积和较大的股二头肌长头体积表明LTS更大（R变化量 = 0.30，P = 0.008）。
LTS较大的健康个体具有一种肌肉形态特征，包括更大的股二头肌长头体积。这可能表明一种生物力学策略，即更依赖股二头肌外侧头产生的力量，而较少依赖股二头肌内侧头产生的力量。
四级。
