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Instantaneous Center of Zero Velocity01:20

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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
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虚拟转点:在人类行走中总是实验性地观察到的?

Johanna Vielemeyer1,2, Lucas Schreff2,3, Stefan Hochstein4

  • 1Institute of Sport Sciences, Friedrich-Schiller-University Jena, Jena, Germany.

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概括

人类行走的稳定性是使用虚拟枢纽点 (VPP) 维持的. 在行走时操纵压力中心通常会保持VPP,这表明其在动态平衡中的强度.

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科学领域:

  • 生物力学 生物力学
  • 人类的机动运动.
  • 步态分析 步态分析

背景情况:

  • 在人类行走过程中保持动态稳定是一个重大挑战.
  • 虚拟枢纽点 (VPP) 策略,指向质量中心以上的地面反应力,是全身平衡的关键机制.
  • 之前的研究已经观察到VPP在各种步态和关键变量的扰动下.

研究的目的:

  • 研究操纵虚拟转点 (VPP) 压力中心的动力学和动力学效应.
  • 确定不同的行走条件如何影响VPP的存在和位置.

主要方法:

  • 11名参与者在各种压力操纵中心条件下行走:赤脚,向后,用刚硬的鞋底,用脚,用手站,与正常鞋子行走相比.
  • 收集了动力和动力学数据来分析VPP.

主要成果:

  • 在所有测试条件中都始终观察到VPP,只有一个参与者在手站行走时没有展示VPP.
  • 垂直VPP位置的显著差异仅在鞋子行走和刚性鞋底行走之间发现.
  • 在水平VPP位置或其在测试条件中的分布上没有观察到显著差异.

结论:

  • 虚拟转点 (VPP) 似乎是一个强大的策略,可以在人类行走时保持动态稳定,即使有很大的压力操纵中心.
  • 虽然VPP通常保持,但更严重的步态变化可能导致其缺失.
  • 提供了一个VPP计算工具,以帮助进一步的研究在实验数据中识别VPP.