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相关概念视频

Changes in the Appendicular Skeleton with Age01:09

Changes in the Appendicular Skeleton with Age

The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...

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在最大冲刺跑步期间,三维骨盆行为中的性别差异.

Kazuki Ota1, Takuya Yoshida2, Hirohiko Maemura3

  • 1Faculty of Health and Sports Science, University of Tsukuba, Ibaraki, Japan - san.tf.hk@icloud.com.

The Journal of sports medicine and physical fitness
|March 25, 2025
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概括

女短跑运动员表现出更大的骨盆横向曲和更低的扭矩,与男性短跑运动员相比,影响了她们的步伐机制和步骤频率. 这项研究突出了女性短跑生物力学的关键差异.

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科学领域:

  • 生物力学 生物力学
  • 运动科学 运动科学 运动科学
  • 人类运动 人类运动

背景情况:

  • 之前对女性冲刺动力学的研究集中在下肢上.
  • 假设在女性短跑运动员中, lumbosacral 侧侧曲扭矩更大,扭矩更低.
  • 在最大冲刺期间对3D骨盆行为和动力学的基于性别的差异的有限理解.

研究的目的:

  • 为了比较女性和男性短跑者之间的刚性参数,3D骨盆行为和动力学.
  • 为了研究在最大冲刺过程中腰部神经关节扭矩的基于性别的差异.
  • 阐明有助于冲刺表现差异的生物力学因素.

主要方法:

  • 利用3D运动捕捉和强力平台从8名女性和8名男性短跑运动员收集数据.
  • 在从起开始的60米冲刺中记录了动力学和动力学.
  • 计算了度参数,3D盆腔运动和关节动力学.

主要成果:

  • 女性短跑运动员的垂直刚度明显低于男性短跑运动员.
  • 女人表现出更大的盆腔侧向自由腿侧的侧向曲和相关的角冲动.
  • 女性的步骤频率明显降低,自由腿侧旋转冲动减少.

结论:

  • 增加的骨盆侧向曲在女性可能有助于上升的质量中心运动.
  • 女人的下 lumbosacral 扭矩可以延迟腿部恢复,导致步骤频率降低.
  • 这些发现突出了女性短跑运动员采用的独特的生物力学策略.