The force–time profile of elite front crawl swimmers
The force–time profile of elite front crawl swimmers
复制标题
精英自由泳运动员的力-时间曲线
DOI：
10.1080/02640414.2011.561867
复制
发表时间：
2011
影响因子：
3.4
通讯作者：
B. Burkett
中科院分区：
文献类型：
--
作者：
D. Formosa;B. Mason;B. Burkett
摘要在这项研究中，我们使用最新发展的技术来确定优秀游泳运动员的力量-时间分布，这使教练员能够在知情的情况下做出技术修改的决定。国际游泳联合会(FINA)排名900+的8名优秀男子游泳运动员完成了5次被动(流线拖曳)和5次净力量(手臂和腿部游泳)选拔赛。三个50赫兹的摄像机被用来记录每一次试验，并与从测力台输出的运动数据同步，在测力台上安装了电动拖曳装置。以受试者的最大前爬泳速度进行被动和净力量测试。对于恒速拖曳，净力分布被表示为力-时间图，承认了恒速假设的局限性。这使得可以识别最小和最大净力和手臂对称性。在平均速度为1.92±0.06m·S−1时，运动员的平均被动阻力为80.3±4.0N，平均净作用力为262.4±33.4N。划水周期中最小净作用力和最大净作用力的平均位置分别为划水的45%(内扫阶段)和75%(上扫阶段)。这一力量-时间分布也确定了任何不对称的卒中。
Abstract In this study, we used recently developed technology to determine the force–time profile of elite swimmers, which enabled coaches to make informed decisions on technique modifications. Eight elite male swimmers with a FINA (Federation Internationale de Natation) rank of 900+ completed five passive (streamline tow) and five net force (arms and leg swimming) trials. Three 50-Hz cameras were used to video each trial and were synchronized to the kinetic data output from a force-platform, upon which a motorized towing device was mounted. Passive and net force trials were completed at the participant's maximal front crawl swimming velocity. For the constant tow velocity, the net force profile was presented as a force–time graph, and the limitation of a constant velocity assumption was acknowledged. This allowed minimum and maximum net forces and arm symmetry to be identified. At a mean velocity of 1.92 ± 0.06 m · s−1, the mean passive drag for the swimmers was 80.3 ± 4.0 N, and the mean net force was 262.4 ± 33.4 N. The mean location in the stroke cycle for minimum and maximum net force production was at 45% (insweep phase) and 75% (upsweep phase) of the stroke, respectively. This force–time profile also identified any stroke asymmetry.