التفاصيل البيبلوغرافية
| العنوان: |
行走步长影响老年人下肢肌力的仿真分析. |
| العنوان البديل: |
Simulated analysis of influence of walking step length on lower limb muscle strength in the elderly. |
| المؤلفون: |
宋翠荣1, 陈童真2, 刘美晓1, 张海峰1 |
| المصدر: |
Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu. 8/8/2023, Vol. 27 Issue 22, p3486-3491. 6p. |
| مصطلحات موضوعية: |
*PSOAS muscles, *MUSCLE strength, *RECTUS femoris muscles, *GROUND reaction forces (Biomechanics), *SKELETAL muscle, *GLUTEAL muscles, *STRENGTH training, *MOTION capture (Human mechanics) |
| الملخص (بالإنجليزية): |
BACKGROUND: Aging is becoming increasingly serious. The elderly with skeletal muscle degeneration do not tolerate high intensity exercise, and are easy to fall, resulting in disability or death. How to improve the lower limb muscle strength of the elderly has become a hot research issue. OBJECTIVE: To provide guidance for daily activities through analyzing the influence of walking step length on lower limb muscle strength of the elderly (> 60 years old), and exploring the appropriate walking style. METHODS: Thirty healthy male elderly subjects aged 65-75 years old were randomly selected and their morphological parameters were measured. The skeletal muscle model was established by importing the simulation software Opensim 4.0. Vicon 2.3 three-dimensional motion capture system was used to record the movement track of the subjects’ normal step and large step walking in real time, and the plantar three-dimensional force platform was used to record the ground reaction force on the plantar during walking. The motion data of the subjects were imported into Opensim 4.0 software to establish the movement model, and the dynamic simulation was carried out. The effectiveness of the method was verified by the data of plantar dynamometer. Muscle strength changes of ilium, rectus femoris, psoas major, gluteus maximus, gluteus medius, biceps femoris, adductor magnus and medial femoral muscle were analyzed during walking with different step lengths in the elderly. The muscle strength data of two different pace walks of each subject were imported into SPSS 20.0 for statistical analysis, and paired t-test was performed. RESULTS AND CONCLUSION: (1) By establishing the skeletal muscle model of the subjects and the movement model of walking with different steps, the muscle strength curves of the important muscles of the lower limbs in the process of walking with different steps were derived. (2) Through statistical analysis, there were significant differences in the muscle strength of walking with different paces (P > 0.05). (3) The change rules of step length and lower limb muscle strength were summarized: within a certain range, with the increase of step length, the muscle strength of rectus femoris, medial femoris and semitendinosus increased significantly, while the muscle strength of ilium, psoas maximus, gluteus maximus, gluteus medius and adductor magnus increased slightly. (4) It is shown that walking with increased step length can improve lower limb muscle strength and can provide a theoretical basis for the elderly to choose correct walking style, rehabilitation training and exercise prescription development. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
背景: 目前人口老龄化日趋严重, 老年人不耐受高强度锻炼, 骨骼、肌肉退化, 常由于跌倒导致伤残或死亡, 如何提高老年人的下肢肌力 成为当前的研究热点问题. 目的: 分析行走步长对老年人(> 60岁)下肢肌力的影响, 探索高效的行走方式, 为日常锻炼提供指导. 方法: 选择30名健康老年人为受试者, 均为男性, 年龄65-75岁, 测量其形态参数, 导入仿真软件Opensim 4.0, 分别建立各受试者骨肌模 型. 应用Vicon 2.3三维动作捕捉系统, 实时记录各受试者正常步长、大步长行走的运动轨迹; 同时采用足底三维测力台记录步行中足底受 到的地面反作用力; 将各受试者运动数据导入Opensim 4.0软件建立运动模型, 进行动力学仿真, 结合足底测力台数据验证其有效性. 模 型经验证后仿真各受试者在不同步长行走过程中, 髂肌、腰大肌、股直肌、臀大肌、臀中肌、股二头肌、半腱肌、大收肌的肌力变化; 将 各受试者2次不同步长行走肌力数据分别导入SPSS 20.0进行统计分析, 行配对t检验. 结果与结论: ①建立了各受试者骨骼肌肉模型及不同步长行走的运动模型, 导出各受试者不同步长行走过程中下肢重要肌肉的时间-肌力 变化曲线; ②经统计学分析, 不同步长行走肌力差异有显著性意义(P > 0.05); ③步长与肌力变化的规律: 正常步频下, 增大步长幅度, 股 直肌、股二头肌、半腱肌肌力显著增加, 髂肌、腰大肌、臀大肌、臀中肌、大收肌轻度增加; ④提示增大步长行走可以提高下肢肌力, 为 老年人选择正确行走方式、相关康复训练以及运动处方开发提供理论基础. [ABSTRACT FROM AUTHOR] |
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