Hiking strap force decreases during sustained upwind sailing

IF 2.4 3区医学 Q2 SPORT SCIENCES

European Journal of Sport Science Pub Date : 2017-04-21 DOI:10.1080/17461391.2016.1268210

R. Buchardt, J. Bay, J. Bojsen-Møller, N. Nordsborg

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引用次数: 3

Abstract

Abstract The hypothesis, that sailing upwind in wind speeds above 12 knots causes fatigue, which manifests as a reduction in exerted hiking strap force and/or maximal isometric voluntary contraction force (MVC) of the knee extensors, was evaluated. Additionally, it was investigated if a relationship exists between maximal exerted hiking force (hMVC) and sailing performance. In part 1 of the study, 12 national level athletes sailed upwind for 2 × 10 min while hiking strap forces were continuously acquired. Before, in between and after sailing periods, the MVC of the knee extensors was measured. In part 2 of the study, hMVC was measured dry land in a hiking bench and correlated with the overall results at a national championship. Hiking strap force decreased from the first to the last minute in both 10 min sailing periods (430 ± 131 vs. 285 ± 130 N, P < .001 and 369 ± 74 vs. 267 ± 97 N, P < .001, respectively), but MVC was similar before, between and after the two 10 min sailing periods (878 ± 215 vs. 852 ± 202 vs. 844 ± 211 130 N). In part 2, a significant positive correlation (r2 = 0.619, P < .01) was observed between hMVC and regatta results. In conclusion, upwind sailing in wind speeds above 12 knots causes sailing-specific fatigue as evidenced by a marked reduction in exerted hiking strap force. However, MVC of the knee extensors was not compromised ∼45 s after hiking was terminated. Additionally, sailing performance is related to maximal hiking force.

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登山带力在持续逆风航行中减小

摘要:本文对风速超过12节的逆风航行会导致疲劳的假设进行了评估，这表现为施加的远足带力和/或膝关节伸肌的最大等距自主收缩力(MVC)的减少。此外，研究了最大远足力(hMVC)与帆船运动成绩之间的关系。在第一部分的研究中，12名国家级运动员逆风航行2 × 10分钟，同时持续获取登山带力。在航行前、航行期间和航行后，测量膝关节伸肌的MVC。在研究的第二部分中，研究人员在旱地徒步旅行的长凳上测量了hMVC，并将其与全国锦标赛的总体结果相关联。在两个10分钟的航行期间，登山带力从开始到最后一分钟都有所下降(430±131 vs 285±130 N, P <。0.001和369±74比267±97 N, P <。(878±215 N / 852±202 N / 844±211 N / 130 N)，但两个10 min航行前、之间和之后的MVC相似。在第2部分中，hMVC与赛艇比赛结果呈显著正相关(r2 = 0.619, P < 0.01)。总之，风速超过12节的逆风航行会导致航行特异性疲劳，这一点可以从远足带施加的力明显减少中得到证明。然而，在徒步结束后45秒内，膝关节伸肌的MVC并未受损。此外，帆船表现与最大徒步力有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

European Journal of Sport Science 医学-运动科学

CiteScore

6.60

自引率

3.10%

发文量

153

审稿时长

6-12 weeks

期刊介绍： The European Journal of Sport Science (EJSS) is the official Medline- and Thomson Reuters-listed journal of the European College of Sport Science. The editorial policy of the Journal pursues the multi-disciplinary aims of the College: to promote the highest standards of scientific study and scholarship in respect of the following fields: (a) Applied Sport Sciences; (b) Biomechanics and Motor Control; c) Physiology and Nutrition; (d) Psychology, Social Sciences and Humanities and (e) Sports and Exercise Medicine and Health.