How do the neck muscles influence head acceleration during sport-associated impact events in high school athletes?

颈部肌肉如何影响高中运动员在运动相关冲击事件中的头部加速度？

• 批准号: 10213102
• 负责人: James Travis Eckner
• 金额: $ 59.38万
• 依托单位: UNIVERSITY OF MICHIGAN AT ANN ARBOR
• 依托单位国家: 美国
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-28 至 2023-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10213102
• 关键词: Acceleration; Affect; Attenuated; Brain Concussion; Cervical; Child; Clinical Trials; Control Groups; Data; Dose; Epidemiology; Event; Exercise; Female; Goals; Head; Health; Injury; Intervention; Investigation; Knowledge; Laboratories; Lead; Long-Term Effects; Manuals; Mission; Morbidity - disease rate; Muscle; Neck; Pilot Projects; Play; Population; Prevention; Protocols documentation; Publishing; Research; Resistance; Risk; Shoulder; Side; Skeletal muscle structure of neck; Soccer; Sports; Statistical Models; Volition; Work; Youth; base; blind; college; disability; epidemiology study; evidence base; exercise intensity; exercise intervention; exercise prescription; exercise program; experience; head impact; high risk; high school; improved; insight; male; muscle hypertrophy; muscle stiffness; neuromuscular; prevent; prospective; recruit; resistance exercise; response; sex; student athlete; translational impact

PROJECT SUMMARY/ABSTRACT Sport-related concussion is a common and serious injury in the ~7.8 million student-athletes who compete at the high school level each year in the U.S. A successful strategy for reducing the risk of concussion and its associated adverse short- and long-term consequences in this population would advance the mission of enhancing health, reducing illness and disability, and promoting children’s chances to achieve their full potential for healthy and productive lives. Neck strengthening exercise may represent such an intervention. Athletes with smaller, weaker necks are thought to be at increased risk for concussion because their necks are less able to counter the forces acting on their heads during sport-associated collisions, leading to greater resultant net head accelerations. However, our understanding of the mechanism governing the neck’s influence over head acceleration remains incomplete, and the potential for this relationship to be modified by exercise remains unclear. These questions must be answered before neck strengthening exercise programs can be optimized to reduce athletes’ risk of concussion. The proposed mechanistic prospective clinical trial will pursue the following specific aims: AIM 1) to determine the effect of manual resistance neck strengthening exercise on neck strength, cervical muscle volume, and net head acceleration under multiple simulated sport- associated impact conditions; AIM 2) to determine the relative influences of neck strength and cervical muscle volume on net head acceleration during simulated sport-associated impacts to the head and body, with and without volitional anticipatory cervical muscle pre-contraction to brace for the impact. The approach to AIM 1 will be to serially reassess the effects of a low or high intensity manual resistance neck strengthening exercise program on key cervical muscle attributes and net head acceleration under each impact condition. Assessments will be performed in 108 high school athletes at baseline and upon completion of 4, 8, and 12 weeks of the exercise intervention, with comparison to a control group participating in a “shoulders-down” exercise program not specifically targeting the neck. The approach to AIM 2 will be to compare the R2 values of statistical models using baseline data collected with and without anticipatory cervical muscle pre-contraction to predict net head acceleration based on either neck strength, cervical muscle volume, or both. This research is expected to establish dose-response relationships for manual resistance neck strengthening exercise on neck strength, cervical muscle volume, and net head acceleration, as well as define the mechanism by which the neck controls head acceleration during impacts to the head and body with and without anticipatory cervical muscle pre-contraction to brace for the impact. This work will provide important mechanistic insight about how the cervical muscles resist head acceleration that will ultimately lead to improved neck strengthening exercise programs for athletes. In doing so, this work will contribute to the long term objective of reducing concussion- related morbidity through the prescription of neck strengthening exercise.

项目摘要/摘要 与运动有关的脑震荡是约780万学生运动员的常见和严重伤害 美国每年的高中一级，降低脑震荡风险的成功策略 相关的不良短期和长期持有率在该人群中会推进使命的使命 改善健康，减少疾病和残疾，并促进儿童实现全部的机会 具有健康和生产力的潜力。 脖子较小，脖子较弱的运动员会增加脑震荡的风险 在体育融合的碰撞期间，无法对抗他们头上的强迫，导致更大的 最终的净头加速度。 头部加速的影响仍然不完整 锻炼仍然不清楚。 可以优化以减少运动员的脑震荡风险。会有一些 追求以下特定目的：目标1）确定手动阻力串联的效果 在多个模拟运动中进行颈部强度，颈肌体积和净头加速度运动 - 相关的影响分区；目标2）确定颈力和颈肌的相对影响 在模拟体育运动对头部，身体的影响期间，净头部加速度的体积 没有志愿的预期宫颈肌肉肌肉预防，以振作起来。 将串行重新评估低的效果 每个影响分区下的关键宫颈肌肉属性和净头加速度的计划。 评估将在BAS Basseline的HLETES的108个高中进行，并在4、8和12的组合压缩后进行评估。 与参加“ shouders down”的对照组相比，运动干预数周 锻炼计划不是专门针对颈部的方法。 统计模型，使用与宫颈肌肉预扣的基线数据一起收集的基线数据 预测基于颈部强度，宫颈肌肉的净加速度或两者兼而有之 有望建立手动阻力颈部增强运动的剂量反应关系 颈部强度，宫颈肌肉体积和净头加速度，并定义了该机制 颈部在撞击头部和身体的情况下，颈部加速有和没有颈椎。 肌肉预扣以支撑这项工作。 宫颈肌肉抵抗头部加速度，最终会导致颈部力量锻炼的改善 运动员的计划。 通过处方颈部强度锻炼的处方相关病态。