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Hiking strap force decreases during sustained upwind sailing.

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      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 (r(2) = 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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      Affiliations
      [1 ] a Department of Nutrition, Exercise and Sport , University of Copenhagen , Copenhagen , Denmark.
      [2 ] b Department of Physical Performance , Norwegian School of Sport Sciences , Oslo , Norway.
      Journal
      Eur J Sport Sci
      European journal of sport science
      Informa UK Limited
      1536-7290
      1536-7290
      May 2017
      : 17
      : 4
      28038503
      10.1080/17461391.2016.1268210

      strength, sailing, performance, Fatigue

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