文章基本信息

标题：Changes in the front and rear knee angles depending on the body and kick plate positions during the kick start
本地全文：下载
作者：IVAN MATÚŠ ; RÓBERT KANDRÁČ ; BIBIANA VADAŠOVÁ 等
期刊名称：Journal of Physical Education and Sport
印刷版ISSN：2247-8051
电子版ISSN：2247-806X
出版年度：2020
卷号：20
期号：6
页码：3323-3329
DOI：10.7752/jpes.2020.s6450
语种：English
出版社：University of Pitesti
摘要：The OBS12 is a new starting platform, which can be used by swimmers at all swimming facilities, because the platform can be mounted to every starting block. The rear knee angle of 90° promotes acceleration during the swim start, which results in shorter block time. The study aims to assess differences in the front and rear knee angles relative to the kick plate position during the kick start. The sample consisted of 10 competitive swimmers (17.5 ± 1.9 years)who were studied in three body positions with all kick plate positions. The video data were collected using a SwimPro camera system. Then, we used the Dartfish© software to evaluate the kinematic parameters for the on-block, flight, and underwater phases. To determine differences in the kinematic data with regard to the kick plate and starting positions, we used the analysis of variance (ANOVA). The statistical software used was Statistica 12. We found that swimmers produced shorter times to 5 meters when the front knee angle and rear knee angles in the starting position ranged from 130⁰ - 132⁰ and 76⁰ - 82⁰, respectively. The rear-weighted position produced higher takeoff and entry angles, shorter glide distance than the front-weighted or neutral-weighted position. According to the results of the study, the swimmers should choose the rearweighted position and adjust the kick plate on the OSB12 starting block to positions 3 (1.749 s) to 4 (1.758 s). We observed changes in all studied swim start parameters between the front-weighted position and rearweighted position forall kick plate positions (p< .05) (Table 2).
关键词：swimming;kinematic parameters;biomechanics;body position