中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (7): 1027-1032.doi: 10.3969/j.issn.2095-4344.2014.07.008

• 组织构建与生物力学 tissue construction and biomechanics • 上一篇    下一篇

不同速度下膝关节等速肌力和自然步速下步态的时空参数比较

纪之光1,庄  洁1,黄  亮2   

  1. 1上海体育学院运动科学学院,上海市  200438
    2奥克兰大学生物力学实验室,新西兰  1072
  • 修回日期:2013-12-18 出版日期:2014-02-12 发布日期:2014-02-12
  • 通讯作者: 庄洁,博士,副教授,上海体育学院运动科学学院,上海市 200438
  • 作者简介:纪之光,女,1988年生,满族,内蒙古自治区包头市人,上海体育学院在读硕士,主要从事运动与健康促进方面的研究。
  • 基金资助:

    上海市人类运动能力开发与保障重点实验室(上海体育学院)(11DZ2261100);上海体育学院研究生国(境)外访学项目资助(shtyfx20130206)

Comparison of isokinetic knee muscle strength under different angular velocity and temporal-distance gait parameter

Ji Zhi-guang1, Zhuang Jie1, Huang Liang2   

  1. 1School of Kinesiology, Shanghai University of Sports, Shanghai 200438, China
    2Laboratory of Biomechanics, the University of Auckland, New Zealand 1072
  • Revised:2013-12-18 Online:2014-02-12 Published:2014-02-12
  • Contact: Zhuang Jie, M.D., Associate professor, School of Kinesiology, Shanghai University of Sports, Shanghai 200438, China
  • About author:Ji Zhi-guang, Studying for master’s degree, School of Kinesiology, Shanghai University of Sports, Shanghai 200438, China
  • Supported by:

    Shanghai Key Laboratory of Human Sport Competence Development and Maintenance (Shanghai University of Sports), No. 11DZ2261100; Post-graduate Overseas Visiting Program of Shanghai University of Sports, No. shtyfx20130206

摘要:

背景:当前研究肥胖对儿童的影响多限于代谢生理问题,对于骨骼肌肉及运动能力研究较少。
目的:比较肥胖儿童与正常儿童膝关节的等速肌力,从肌力方面分析肥胖儿童运动能力下降的原因。
方法:招募56名儿童,其中28名肥胖儿童,28名正常儿童。采用CON-TREX等速测试仪测量下肢肌力,采用VICON系统采集运动数据,采用SPSS 19.0统计软件对所有实验数据进行统计学处理。
结果与结论:在同一速度下,肥胖儿童的膝关节伸屈绝对峰力矩和平均功率大于正常儿童(P < 0.05),但是相对峰力矩和相对平均功率与正常儿童没有显著区别[除60 (°)/s时伸肌群肥胖组显著低于正常组外](P > 0.05)。在同一速度下,两组儿童的伸肌群力矩和功率均大于屈肌群(P < 0.05),同时肥胖组儿童在较高速度[120 (°)/s]下伸屈肌群绝对峰力矩和绝对平均功率与相对峰力矩和相对平均功率差异均有显著性意义(P < 0.05)。两组儿童均表现屈肌在较高速度下力矩大,伸肌在较低速度下力矩大。正常儿童的步频步速快于肥胖儿童,单步时间和步宽显著小于肥胖儿童(P < 0.05)。结果显示肥胖儿童绝对肌力大于正常儿童,但相对肌力等于甚至小于正常儿童,同时肥胖儿童步速较慢,步频较低,这可能解释为由于下肢肌力较弱,导致运动能力不足。



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

关键词: 组织构建, 组织工程, 肥胖儿童, 等动肌力, 膝关节, CON-TREX

Abstract:

BACKGROUND: The current studies concerning the effect of obesity on children are limited to metabolic physiology, and there is little evidence available on skeletal muscle and motor ability.
OBJECTIVE: To compare isokinetic knee muscle strength between obese children and normal children, and analyze the causes of physical performance decline in obese children.
METHODS: A total of 56 children were recruited in this study, including 28 obese children and 28 normal children. The isokinetic muscle strength was tested by CON-TREX. The gaits were tested by VICON. The statistical analysis of all the differences between obese children and normal children were measured using SPSS 19.0 software.
RESULTS AND CONCLUSION: At the same gait speed, obese children had higher absolute peak torque and average power than normal children (P < 0.05), but relative peak torque and relative average power showed no significant difference compared with normal children (P > 0.05) except extensor group at 60(°)/s was significantly lower than normal children. At the same gait speed, the torque and power of extensor group were significantly higher than that of flexor group in the two groups (P < 0.05); he obese children showed significant differences in the absolute peak torque and absolute average power compared with relative peak torque and relative average power of flexor group at 120(°)/s (P < 0.05). In the two groups, the extensor exhibited higher torque in high speed, while the high flexor torque was found in low speed. Normal children had faster cadence and walking speed, significantly smaller step width and shorter stride time than obese children (P < 0.05). Obese children have smaller relative strength and higher absolute strength than normal children; in addition, the low cadence and walking speed are found in obese children. These factors contribute to weak limb strength and insufficient motor ability.



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

Key words: overweight, child, muscle strength, knee joint

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