目的 筛选安全简易的方法对老年人下肢肌力进行测评,旨在更全面地评价老年人体质状况,并有利于引导老年人进行合理的下肢肌力练习.方法 对64名老年人进行30 s连续坐椅测试,同时进行Cybex等动肌力测试以及利用Inbody身体成分仪测试肌肉含量,进行相关性分析和信度效度检验；在此基础上,对249名老年人进行30 s连续坐椅测试,初步建立老年人评价参考值.结果 30 s连续坐椅次数与膝关节60°/s、180°/s屈、伸峰力矩、平均功、总功均呈显著性相关,与60°/s的相关性系数为0.479～0.850;与180°/s的相关性系数为0.602～0.905;30 s连续坐椅次数与下肢肌肉含量的相关系数为男0.724,女0.751;60～69岁老年人30 s连续坐椅次数为男(16.5±4.7)次,女(15.3±4.0)次.结论 30 s连续坐椅次数与下肢肌肉力量、耐力呈线性相关关系,其测试方法安全简便,能较好地评价老年人下肢肌肉力量,该研究建立的评价参考值可用于老年人下肢肌肉力量评价.%Objective To screen a simple and safety method to evaluate the elderly lower limb muscle strength in order to give a more comprehensive evaluation of the elder's physical condition, which will guide the elderly do exercise of lower limbs muscle strength more reasonable. Methods 64 elderly people were selected to participate in the test of '30 seconds continuous seat'. Cybex isokinetic muscle strength testing and muscle content testing by Inbody body composition were conducted at the same time, which for the correlation analysis and to test the reliability and validity; on this basis, take test of '30 seconds continuous seat' on 249 elderly people, preliminarily established the elderly evaluation references. Results The numbers of '30 seconds continuous seat' were significantly correlated with knee 60°/s, 180°/s flexion, extension peak torque, average power and total work, correlation coefficient of 60°/s was 0. 479 ～0. 850;correlation coefficient of 180°/s was 0. 602 ~0. 905;the correlation coefficient of lower limb muscle content with '30 seconds continuous seat' for male was 0. 724 and female was 0. 751 ; the number of aged 60 ~90 elderly people of '30 seconds continuous seat' for male was 16. 5 ±4. 7 and female was 15. 3 ±4. 0. Conclusions There is a linear correlation that the number of '30 seconds continuous seat' with lower limb muscle strength and endurance. The test method is safe and simple, it can better evaluate the elderly lower limb muscle strength, the evaluation reference which established in this research can be used for the evaluation of the elderly lower limb muscle strength.
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