腰背旋转运动过程中核心肌群等长与等速测试的相关性研究

Isometric and isokinetic testing of core muscles during trunk rotation

目的探讨腰背旋转运动过程中核心肌群等长与等速测试结果的相关性。方法对38例健康男性受试者分别进行核心肌的等长旋转和等速（60°／s）旋转测试，将2种方法测试的左旋、右旋峰力矩（PT）和左右两侧峰力矩之比（L／R）进行配对t检验和相关与回归分析。结果腰背旋转肌群等长和等速测试中的PT值呈显著正相关（P〈0．01），等长和等速肌力测试所获得的PT值建立的回归方程式为Y左=22．330＋0．937x和Y右=32．752＋0．847x，经检验成立并有统计学意义（P〈0．05），而左右两侧峰力矩之比（L／R）亦呈显著正相关（P〈0．01），回归方程为Y=0．389＋0．595x；将等速收缩和等长收缩测试的峰力矩进行配对t检验（P〈0．01），差异有统计学意义，而L／R差异无统计学意义（P〉0．05）。结论 核心肌的等长与等速旋转测试的峰力矩具有良好的相关性，两者均能反映旋转过程中核心肌的最大肌力。临床上可根据患者的临床症状及病情严重程度，合理选择等长或等速肌力测试方法进行评估，进而更好地指导临床康复的评定和治疗。

Objective To quantify the correlation between isometric and isokinetic tests of core mus- cles during trunk rotation. Methods The strength of the core muscles of 38 healthy males was measured iso- metrically and isnkineticaily （at 60°/s） during trunk rotation. The left and right peak rntation torque （LPT, RPT） and the ratio of left to right torque （L/R） were analyzed using correlation and regression analysis and paired t-tests. Results The subjects＇ LPTs and RPTs were positively correlated （ rL = 0. 644, P≤ 0. 01 ; rR = 0. 566, P≤0.01 ） There were significant differences in the L/R ratios determined using the two tests （ r = 0.663,P≤0.01）. The regression equations predicting LPT and RPT were yl=22. 330 ＋0. 937x and YR = 32. 752 ＋0.847x, respectively. Paired t-tests showed that tL =4.562, P≤0.01 and ta =3. 855, P≤0.01 during left or right rotation. There was a significant difference, but there was no significant difference in LPT/ RPT. Conclusion Isometric and isokinetic tests of core muscles during trunk rotation give results which are strongly correlated. Either can correctly reflect the maximal strength of core muscles during trunk rotation. Cli- nicinas may reasonably choose either testing method to assess patients and guide treatment according to the patient＇s clinical symptoms and the severity of the problem.