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Influence of Step-Width Manipulation on Running Biomechanics
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生物机械机制调节步伐频率在行走过程中.

Russell T Johnson1, Brian R Umberger2

  • 1Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, United States; Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, United States; Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL, United States.

Journal of biomechanics
|January 30, 2025
PubMed
概括

人类适应步行步伐频率以尽量减少努力,但偏差增加肌肉需求. 慢步行 (-20%) 更多地吸引了关节和腹膜,而快步行 (+20%) 增加了腿筋和腹膜活动.

关键词:
诱导加速 诱导加速机车运动 机车运动肌肉-肌力量 肌肉-肌力量肌肉肌力量 肌肉肌力量

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科学领域:

  • 生物力学 生物力学
  • 人类的机动运动.
  • 肌肉骨系统的建模

背景情况:

  • 人类自然采用自我选择的步伐频率,以尽量减少行走期间的代谢成本.
  • 环境因素可能需要改变步伐频率,影响肌肉动态.

研究的目的:

  • 为了全面分析肌动力学在人类行走中不同步骤频率的肌动力学.
  • 量化改变步伐频率对肌肉肌力量,力量和质量中心加速的影响.

主要方法:

  • 8名受试者以自选的+20%,-20%和-20%的脚步频率以恒定速度 (1.3米/秒) 走路.
  • 肌肉骨模型被用来计算九个肌肉群的肌肉力量,功率和诱导加速.
  • 使用统计参数映射来比较条件.

主要成果:

  • 较慢的 (-20%) 脚步频率增加了 gluteus medius,胃半和前的力量/力量/加速.
  • 步伐更快 (+20%) 步伐频率在腿筋,大腿直骨和大腿中增加了力量/力量/加速.
  • 胃角膜主要通过动力学影响了向前加速,而不是肌肉力量.

结论:

  • 偏离自我选择的步伐频率会增加下肢肌肉的需求,这表明首选的频率可以优化肌肉的工作.
  • 了解肌对步伐频率变化的反应,可以深入了解步行模式的选择.