Three-Dimensional Torso Motion in Tethered Front Crawl Stroke and its Implications on Low Back Pain
Three-Dimensional Torso Motion in Tethered Front Crawl Stroke and its Implications on Low Back Pain
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DOI：
10.1123/jab.2015-0024
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发表时间：
2016-02-01
影响因子：
1.4
通讯作者：
Yanai, Toshimasa
中科院分区：
文献类型：
--
作者：
Du, Tanghuizi;Narita, Ikumi;Yanai, Toshimasa
下背痛是竞技游泳运动员的常见问题，反复的躯干过伸被认为是一个病因。本研究的目的是描述三维躯干配置在前爬泳和测试的假设，游泳运动员的经验躯干过伸一致的整个中风周期。19名大学生游泳运动员进行了2项测量：测量活动范围的3个维度和测量的束缚前爬泳在他们的最大努力。躯干伸展超过躯干活动范围定义为躯干过伸。在冲程循环期间表现出的最大躯干伸展角为9 +/- 11度，并且在躯干达到最大扭转角的时刻0.02 +/- 0.08 s或其附近记录。没有参与者过度伸展的躯干一致的整个中风周期和主题表现出躯干伸展角度在拴系前爬泳远小于他们的主动运动范围。因此，我们的假设被拒绝了，数据表明，在前爬泳泳中重复的躯干过伸不应该被认为是游泳运动员腰痛高发的主要原因。
Low back pain is a common problem among competitive swimmers, and repeated torso hyperextension is claimed to be an etiological factor. The purpose of this study was to describe the three-dimensional torso configurations in the front crawl stroke and to test the hypothesis that swimmers experience torso hyperextension consistently across the stroke cycles. Nineteen collegiate swimmers underwent 2 measurements: a measurement of the active range of motion in 3 dimensions and a measurement of tethered front crawl stroke at their maximal effort. Torso extension beyond the active range of torso motion was defined as torso hyperextension. The largest torso extension angle exhibited during the stroke cycles was 9 +/- 11 degrees and it was recorded at or around 0.02 +/- 0.08 s, the instant at which the torso attained the largest twist angle. No participant hyperextended the torso consistently across the stroke cycles and subjects exhibited torso extension angles during tethered front crawl swimming that were much less than their active range of motion. Therefore, our hypothesis was rejected, and the data suggest that repeated torso hyperextension during front crawl strokes should not be claimed to be the major cause of the high incidence of low back pain in swimmers.