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采样和过频率对棒球投球数据的影响
Brittany Dowling1,2, Jonathan S Slowik3, Glenn S Fleisig3
1Sports Performance Center, Midwest Orthopaedics at RUSH, Chicago, IL, USA.
Sports biomechanics
|February 10, 2026
概括
对于棒球投球分析,过器频率显著影响动力学和动力学变量,而不是样本频率. 研究人员建议至少采用240Hz的采样频率和18.0Hz的低通波器,以准确捕捉运动.
科学领域:
- 生物力学 生物力学
- 运动科学 运动科学 运动科学
- 运动分析 运动分析
背景情况:
- 棒球投球是人类最快的运动,需要高样本频率来准确地捕获数据.
- 之前的研究使用了不同的样本频率 (240-500 Hz) 和低通波器频率 (通常为 13.4 和 18.0 Hz).
研究的目的:
- 研究不同采样频率 (240 Hz和480 Hz) 和低通波器频率 (13.4 Hz,18.0 Hz,27.2 Hz) 对棒球投球生物力学的影响.
- 要确定哪个频率参数,样品或过器,对动力学,时间和动力学变量有更大的影响.
主要方法:
- 收集了28名专业投手以480赫兹的快球的基于标记器的运动捕捉数据.
- 将数据向下采样到240 Hz,并将三个低通波频率 (13.4,18.0,27.2 Hz) 应用于每个数据集.
- 计算了26个生物机械变量,并使用双向重复测量ANOVA比较差异,引用最小临床重要差异 (MCID).
主要成果:
- 过频率表现出更大的影响,在26个变量中的13个变量中,与采样频率 (26个变量中的4个) 相比,在MCID上造成显著差异.
- 需要差异化的变量,如速度和扭矩,最受频率选择的影响.
- 与临床重要差异最小值 (MCID) 相对解释差异.
结论:
- 在投球分析中,建议采用240Hz的最低采样频率用于基于标记器的运动捕获.
- 建议使用巴特沃斯低通波器频率为18.0Hz,以获得最佳的准确度,以捕捉投球力学.
- 过频率是一个比样本频率更关键的参数,用于分析投球生物力学.
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