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相关概念视频

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The human leg comprises an intricate system of muscles that facilitate the movement of feet and toes. Within this system, the muscles are categorized into the anterior, lateral, and posterior compartments, each with a unique set of muscles carrying out specific functions.
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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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Updated: Jun 18, 2025

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running
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长距离跑步期间纵向弧度的适应性变化

Weiyan Ren1, Yan Wang2, Zhaoqi Yan3

  • 1School of Engineering Medicine, Beihang University, Beijing, China.

International journal of sports medicine
|July 31, 2024
PubMed
概括

长距离跑步者在15分钟的跑步过程中显示出纵向弧度 (LA) 刚度的初始下降和弧形变形的增加,随后出现稳定. 这种调整可能会提高运行经济性和性能.

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科学领域:

  • 生物力学 生物力学
  • 体育科学 运动科学 运动科学
  • 人体生理学 人体生理学

背景情况:

  • 纵向弧 (LA) 对于跑步者的冲击吸收和推进至关重要.
  • 了解LA在长时间运行期间的动态适应是优化性能和预防受伤的关键.

研究的目的:

  • 为了研究长途跑步者在60分钟的跑步过程中纵向 (LA) 的生物机械适应.
  • 分析LA刚度,角度和时刻的变化,以及它们与跑步表现的关系.

主要方法:

  • 20名长途跑者以2.7米/秒的速度跑了60分钟.
  • 动力学和动力学数据每五分钟收集一次,以计算LA刚度 (k_load,k_unload),最大LA时刻 (M_max) 和LA角度变化 (Δθ_range,Δθ_max).
  • 在跑前和跑后扫描足部形态.

主要成果:

  • 在最初的15分钟内,LA负载刚度 (k_load) 显著下降.
  • 观察到LA角度范围 (Δθ_范围) 和最大角度变化 (Δθ_max) 的同时增加.
  • 在运行后的卸载刚度 (k_unload),最大矩 (M_max) 或脚形态方面没有发现显著的变化.

结论:

  • 跑步者在长时间跑步后15分钟内就会在LA力学中表现出最初的关键适应阶段.
  • 这些适应性,以降低度和增加灵活性为特征,可能是改善运行经济性至关重要的.
  • 对这些适应性的进一步研究可以为提高跑步性能的培训策略提供信息.