扭矩发展的速度作为扭矩-转速关系的决定因素
Gennaro Boccia1,2, Paolo Riccardo Brustio1,2, Francesco Salvaggio2,3
1Department of Clinical and Biological Sciences, University of Turin, Torino, Italy.
Scandinavian journal of medicine & science in sports
|March 14, 2025
概括
扭矩发展的同度率 (RTD) 和最大自发扭矩 (MVT) 显著预测了动态膝盖延伸器力量的产生. 具体来说,RTD影响最大速度 (V0),而MVT决定最大扭矩 (T0) 和RTD影响最大功率 (Pmax).
科学领域:
- 生物力学 生物力学
- 人体生理学 人体生理学
- 运动科学 运动科学 运动科学
背景情况:
- 扭矩-速度 (TV) 关系对于理解动态肌肉功能至关重要.
- 扭矩发展的同度率 (RTD) 和最大自愿扭矩 (MVT) 是肌肉力量的关键指标.
- 通过研究同度测量和动力力产生之间的联系,可以揭示潜在的生理决定因素.
研究的目的:
- 为了确定从TV关系中得出的异面RTD和MVT对动力力产参数 (V0,T0,Pmax) 的贡献.
- 为了确定哪些特定的同度测量最好地预测膝盖伸缩器中动态肌肉性能的不同方面.
主要方法:
- 64名年轻成年人进行了单腿膝盖延伸器测试.
- 记录了同度RTD和电肌图 (EMG) 信号.
- 动态的,非异位运动的收缩被用来建立个别的电视关系通过超标回归.
- 逐步线性回归分析了RTD和MVT在V0,T0和Pmax上的预测能力.
主要成果:
- 电视关系是通过超标回归 (r2范围:0.9830.993) 准确地建模的.
- 50毫秒的正常化RTD (RTD50) 是理论最大速度 (V0) (R2=0.145,p=0.004) 的主要预测因素.
- 最大自愿扭矩 (MVT) 是理论最大扭矩 (T0) 的最强决定因素 (R2=0.760,p<0.001).
- 在150ms的RTD (RTD150) 显著预测最大功率 (Pmax) (R2=0.612,p<0.001).
结论:
- 动力力产生能力,特别是在更高的速度 (V0),部分由快速扭矩生成 (爆炸力) 解释.
- 在收缩的初始阶段 (与RTD相关) 快速产生扭矩的能力影响V0.0.
- MVT仍然是最大扭矩产生的主导因素,而RTD对于预测最大功率和影响最大速度至关重要.
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