Allison S C, Westphal K A, Finstuen K
Program in Exercise Science, University of Texas at Austin 78712.
J Orthop Sports Phys Ther. 1993 Dec;18(6):661-6. doi: 10.2519/jospt.1993.18.6.661.
Although tape measurement of thigh girth is a common component of a clinical knee examination, the implications of thigh girth asymmetry are not well understood. The purpose of this study was to examine the relationship between thigh girth asymmetry and torque asymmetry for extension and flexion of the knee. Thirty subjects with thigh girth asymmetry of at least 2 cm, measured at a site 15 cm proximal to the superior pole of the patella, were studied. Subjects were measured for girth at 10 sites along each thigh. Knee flexion and extension torque production were also tested on a Cybex II isokinetic dynamometer. Girth asymmetry was determined by the difference in measurements between the subjects' smaller and larger thighs. Percent girth asymmetries varied by site, with the greatest average girth asymmetry (asymmetry = 5.94%) at 16 cm proximal to the superior patellar pole. Percent peak torque asymmetries were computed from the differences between subjects' stronger vs. weaker thighs. Correlations and regressions of both extension and flexion torque asymmetries upon girth asymmetry sites showed higher associations and less error for more proximal measurements. Fair to moderate correlation coefficients (r = .37-.42, p < .05) were statistically significant for extension torque asymmetry compared with girth asymmetry at sites 12, 14, 16, and 20 cm proximal to the patella and for flexion torque asymmetry only at the 14-cm site. Although girth and torque asymmetries were found to be somewhat related, percent girth asymmetry provided only a limited prediction of percent peak torque asymmetry.
尽管测量大腿围度是临床膝关节检查的常见组成部分，但大腿围度不对称的影响尚未得到充分理解。本研究的目的是探讨大腿围度不对称与膝关节屈伸扭矩不对称之间的关系。对30名受试者进行了研究，这些受试者在髌骨上极近端15厘米处测量的大腿围度不对称至少为2厘米。在每条大腿上沿着10个部位测量受试者的围度。还使用Cybex II等速测力计测试了膝关节屈伸扭矩的产生情况。围度不对称由受试者较小和较大大腿之间的测量差异确定。不同部位的围度不对称百分比各不相同，在髌骨上极近端16厘米处平均围度不对称最大（不对称率 = 5.94%）。峰值扭矩不对称百分比根据受试者较强与较弱大腿之间的差异计算得出。屈伸扭矩不对称与围度不对称部位的相关性和回归分析表明，对于更近端的测量，关联度更高且误差更小。与髌骨近端12、14、16和20厘米处的围度不对称相比，伸展扭矩不对称的相关系数为中等（r = 0.37 - 0.42，p < 0.05），具有统计学意义，而屈曲扭矩不对称仅在14厘米处具有统计学意义。尽管发现围度和扭矩不对称之间存在一定关联，但围度不对称百分比对峰值扭矩不对称百分比的预测作用有限。
