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相关概念视频

Impulse01:13

Impulse

According to Newton’s second law of motion, the rate of change of the momentum of an object is the net external force acting on it. The total change in momentum between two timepoints thus depends on both the external force acting on it and the time over which it acts. Describing this mathematically, the total change of an object’s motion is proportional to the force vector and the time over which it is applied. This product is called impulse.
Additionally, it can be shown that the total...

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什么时候拉动机:使用仪器口罩对大脑加速事件进行近似的概念性考虑.

James Tooby1, Kevin Till2,3, Andrew Gardner2,4

  • 1Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK. j.tooby@leedsbeckett.ac.uk.

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概括

仪器口罩 (iMG) 可以接近运动中的头部加速事件 (HAE). 然而,虚假阴性等技术限制意味着iMG数据可能低估了实际的HAE暴露,特别是在较低的幅度.

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科学领域:

  • 生物力学 生物力学
  • 运动医学 运动医学
  • 可穿戴技术可穿戴技术

背景情况:

  • 由于潜在的脑损伤风险,头部加速事件 (HAE) 在体育运动中是一个重大问题.
  • 仪器口罩 (iMG) 用于大致估计HAE,为伤害预防研究提供了有价值的数据.
  • 了解IMG的局限性对于准确解释运动员HAE数据至关重要.

研究的目的:

  • 探索iMG在接近HAE方面的技术限制.
  • 讨论利益相关者对iMG数据的解释的概念考虑.
  • 突出虚假阳性和虚假阴性对HAE暴露估计的影响.

主要方法:

  • 分析iMG记录的传感器加速事件.
  • 在传感器事件,iMG数据和体内HAE之间进行区分.
  • 对 iMG 数据中导致虚假阳性和虚假阴性的机制的审查.

主要成果:

  • 基于iMG的HAE近似被虚假阳性 (记录没有发生的事件) 和虚假阴性 (未能记录实际事件) 限制.
  • 视频验证和后处理算法有效地减少了假阳性.
  • 对虚假负面的缓解策略不那么全面,导致潜在的低估HAE暴露.

结论:

  • 目前的IMG研究可能低估了运动员的HAE暴露,特别是对于较低幅度的事件,由于未解决的假阴性.
  • 未来的研究应该集中在缓解iMG技术中的虚假负面.
  • 现有的iMG数据集需要仔细解释,考虑到可能低估HAE暴露的可能性.