Shultz Sandra J, Nguyen Anh-Dung, Levine Beverly J
University of North Carolina at Greensboro, Greensboro, North Carolina.
Sports Health. 2009 Jan;1(1):54-60. doi: 10.1177/1941738108326702.
Lower extremity alignment may influence the load distribution at the knee, potentially predisposing the anterior cruciate ligament to greater stress. We examined whether lower extremity alignment predicted the magnitude of anterior knee laxity in men and women. HYPOTHESIS: Greater anterior pelvic angle, hip anteversion, tibiofemoral angle, genu recurvatum, and navicular drop will predict greater anterior knee laxity. STUDY DESIGN: Descriptive laboratory study. METHODS: Women (n = 122) and men (n = 97) were measured for anterior knee laxity and 7 lower extremity alignment variables on their dominant stance leg. Linear regression determined the extent to which the alignment variables predicted anterior knee laxity for each sex. RESULTS: Lower anterior pelvic tilt and tibiofemoral angle, and greater genu recurvatum and navicular drop were related to greater anterior knee laxity in women, explaining 28.1% of the variance (P < .001). Lower anterior pelvic tilt and greater hip anteversion, genu recurvatum and navicular drop were predictors of greater anterior knee laxity in men, explaining 26.5% of the variance (P < .001). CONCLUSION: Lower anterior pelvic tilt, greater knee hyperextension, and foot pronation predicted greater anterior knee laxity in both men and women, with genu recurvatum and navicular drop having the greatest impact on anterior knee laxity. Greater hip anteversion was also a strong predictor in men, while a lower tibiofemoral angle was a significant predictor in women. CLINICAL RELEVANCE: The associations between lower extremity alignment and anterior knee laxity suggest that alignment of the hip, knee, and ankle may be linked to or contribute to abnormal loading patterns at the knee, potentially stressing the capsuloligamentous structures and promoting greater joint laxity.
下肢对线可能会影响膝关节的负荷分布，从而可能使前交叉韧带承受更大的应力。我们研究了下肢对线是否能预测男性和女性膝关节前向松弛的程度。
更大的骨盆前倾角度、髋前倾角、胫股角、膝反屈和舟骨下降将预测更大的膝关节前向松弛。
描述性实验室研究。
对122名女性和97名男性的优势站立腿测量膝关节前向松弛和7个下肢对线变量。线性回归确定了每个性别的对线变量预测膝关节前向松弛的程度。
较低的骨盆前倾和胫股角，以及较大的膝反屈和舟骨下降与女性更大的膝关节前向松弛有关，解释了28.1%的方差（P < .001）。较低的骨盆前倾、较大的髋前倾角、膝反屈和舟骨下降是男性更大的膝关节前向松弛的预测因素，解释了26.5%的方差（P < .001）。
较低的骨盆前倾、更大的膝关节过度伸展和足内翻预测了男性和女性更大的膝关节前向松弛，其中膝反屈和舟骨下降对膝关节前向松弛的影响最大。较大 的髋前倾角也是男性的一个强预测因素，而较低的胫股角是女性的一个重要预测因素。
下肢对线与膝关节前向松弛之间的关联表明，髋、膝和踝关节的对线可能与膝关节的异常负荷模式相关或导致异常负荷模式，可能会使关节囊韧带结构承受压力并促进更大的关节松弛。
