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A decreasing function describes a relationship where the output consistently declines as the input increases. This means that for any two input values, if one is greater than the other, the corresponding output is smaller. Mathematically, a function f is decreasing on an interval I if for every x1 < x2​ in I, f (x1) > f (x2). This type of behavior is visually identified on a graph that slopes downward from left to right.The nature of a function can be analyzed by calculating...
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假期周的实施是否降低了国家曲棍球联盟的受伤率?

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国家曲棍球联盟 (NHL) 休赛周显著减少了球员的整体伤害和特定伤害类型,如肌肉和膝盖问题. 这表明,有计划的休息可以降低职业体育运动中的受伤率.

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在这里,NHL NHL NHL NHL.休息时间是休息时间.曲棍球 曲棍球 曲棍球冰 冰 冰 冰 冰 冰伤害伤害伤害伤害伤害伤害伤害伤害伤害肌肉 肌肉 肌肉 肌肉 肌肉

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科学领域:

  • 运动医学 运动医学
  • 流行病学 流行病学
  • 生物力学 生物力学

背景情况:

  • 国家曲棍球联盟 (NHL) 在2016-2017年推出了一个中赛季休赛周,这是其他职业体育运动中常见的做法.
  • 这一举措旨在在繁忙的赛季中为球员提供休息时间.

研究的目的:

  • 为了比较受伤率,由于受伤而错过的比赛,以及在NHL赛季之前和之后的多次受伤事件.
  • 分析休息周对不同类型的球员伤害的影响.

主要方法:

  • 一项回顾性描述性流行病学研究分析了2000年至2023年的NHL伤害数据.
  • 伤害数据是从公开可用的在线体育数据库中收集的.
  • 使用多变量回归模型来比较伤病率,并评估辅助周的影响,根据球员的位置进行调整.

主要成果:

  • 每个赛季的整体伤害率在休息周实施后从763.7大幅下降到646.7 (P = .005).
  • 防守队员的受伤比例显著下降 (P < .001).
  • 肌肉损伤 (OR,0.26),膝盖损伤 (OR,0.41) 和手臂/肩膀损伤 (OR,0.39) 的概率显著下降. 由于受伤而错过的比赛略有增加,从9.02增加到10.53 (P < .001).

结论:

  • 在NHL引入休赛周与整体球员受伤率的减少有关.
  • 预定的中赛休息似乎对受伤模式产生了积极的影响,可能会降低特定类型受伤的发生率.