地面反应力-时间概况的单模和双模曲线识别掉落跳跃性能
Hsien-Te Peng1, Chien-Ting Lai2, Hung-Li Lin3
1Department of Physical Education, Chinese Culture University, Taipei City, Taiwan.
Sports biomechanics
|January 5, 2024
概括
该研究发现,与双模 (BIC) 配置文件相比,在落地跳跃 (DJ) 期间,单模 (UNC) 地面反应力 (GRF) 配置文件显示出更好的性能和高效的拉伸缩短周期功能. 具有UNC形状的运动员表现出明显的动力学和动力学差异.
科学领域:
- 生物力学 生物力学
- 运动科学 运动科学 运动科学
- 人类运动分析 人类运动分析
背景情况:
- 跌跳 (DJ) 是许多体育运动中的一个关键表现指标.
- 地面反应力 (GRF) 时间概况为跳跃力学提供了洞察力.
- 了解单模 (UNC) 和双模 (BIC) GRF配置文件之间的差异对于优化运动表现至关重要.
研究的目的:
- 在DJ的同心阶段,研究UNC和BICGRF时间档案之间的动力学和动力学差异.
- 为了确定与每个GRF配置文件类型相关的生物力学特征.
- 确定UNC和BIC个人资料对DJ表演和培训的影响.
主要方法:
- 招募了22名男性体育学院的学生,分为UNC (N=11) 和BIC (N=11) GRF时间的个人资料组.
- 利用同步的强力板和红外摄像头来捕获30厘米的落下跳跃期间的GRF和运动数据.
- 采用Shapiro-Wilk,Wilcoxon和独立的t测试进行动力学和动力学变量的统计分析.
主要成果:
- 与BIC组相比,UNC组的地面接触时间显著缩短,跳跃高度更低,腿部度更大.
- 在异常阶段,UNC组的峰值功率更大,在异常/同心阶段的工作更少.
- 在UNC组中观察到更大的部和膝关节曲/延伸角度位移 (p <0.05). 两组之间没有发现反应强度指数的显著差异.
结论:
- 在DJ期间的单模 (UNC) 和双模 (BIC) GRF时间配置文件可以为适当的培训实践提供信息.
- UNC的形状表明了卓越的DJ性能,其特点是高效的拉伸缩短周期.
- 动力学和动力学区别突出了与UNC GRF档案相关的生物机械优势.
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