文章基本信息

标题：Comparison of Two Methods to Estimate the Maximal Velocity of a Ball during an Overhand Throw
本地全文：下载
作者：Alanna Weisberg ; Julie Le Gall ; Pro Stergiou 等
期刊名称：Proceedings
电子版ISSN：2504-3900
出版年度：2020
卷号：54
期号：36
页码：43
DOI：10.3390/proceedings2020049043
语种：English
出版社：MDPI AG
摘要：Maximal ball velocity is a significant performance indicator in many sports, such as baseball. Doppler radar guns are widely assumed to underestimate velocity. Accuracy increases as the cosine angle between the radar gun and the object decreases. The purpose of this study was to investigate the impact of player handedness and the location of the radar gun on the accuracy of ball velocity. Throws were analyzed in four conditions: the radar gun on the right side, throwing with the right arm, then with the left arm; and the radar gun on the left side, throwing with the right arm, then with the left arm. The Cronbach’s alpha for all four conditions showed α-values above 0.97; however, a paired t-test indicated significant differences between the 3D motion analysis and the radar gun. Bland–Altman plots show a high degree of scatter in all conditions. Results suggest that the radar gun measurements can be highly inconsistent when compared to 3D motion analysis.