在最大速度冲刺的后期摆动阶段,双关节腿筋肌肉之间的力量生成能力的肌肉间差异
Terumitsu Miyazaki1, Norihisa Fujii2
1National Institute of Fitness and Sports in Kanoya, Kanoya, Kagoshima, Japan.
Sports biomechanics
|July 21, 2023
概括
腿筋肌肉结构的差异会影响冲刺期间的肌肉力量. 半膜体 (SM) 显示与双腿长头 (BFlh) 和半体 (ST) 相比独特的力量生成时间,由于结构变化.
科学领域:
- 生物力学 生物力学
- 人类运动科学科学 人类运动科学
- 运动生理学 体育生理学
背景情况:
- 腿筋肌肉对于冲刺表现至关重要.
- 肌肉结构的肌肉间差异可能会影响像冲刺这样的动态运动中肌肉力量的产生.
研究的目的:
- 为了研究双关节腿筋肌肉 (BFlh,SM,ST) 的结构差异如何影响最大冲刺的后期摆动阶段肌肉间的肌肉力量.
- 探索肌单位属性与力量产生能力之间的关系.
主要方法:
- 利用肌肉骨模型来估计肌运动,肌肉力量和力量生成能力的双腿长头 (BFlh),半膜体 (SM) 和半体 (ST).
- 分析了40名男性运动员在最大速度冲刺的后期摇摆阶段的数据.
- 评估基于力-长度-速度属性和笔纹角的力量产生能力.
主要成果:
- 半膜体 (SM) 在后期摇摆阶段的前半部分表现出较低的力量产生能力,而在后半部分表现出较高的力量产生能力,与双腿骨长头 (BFlh) 和半体 (ST) 相比.
- 力量产生能力的肌肉间变化与肌肉-肌单位长度,肌肉纤维长度和肌长度的差异有关.
- 峰值肌肉力量在BFlh和ST中比在SM中更早地实现.
结论:
- 腿筋肌肉之间肌肉肌结构的肌肉间差异在冲刺的后期摇摆阶段显著影响时间变化的肌肉力量产生.
- 肌动力学和力量生成能力是这些力量差异的关键媒介.
- 了解这些建筑影响可以为短跑者提供培训策略.
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