视觉和多重认知任务对着陆前和早期着陆机制的影响与ACL负载相关
Ling Li1, Yu Song2, Peyton Hatcher3
1Division of Kinesiology and Health, University of Wyoming, Laramie, WY, USA; Department of Health & Human Performance, College of Idaho, Caldwell, ID, USA.
Gait & posture
|January 31, 2026
概括
视力缺失显著影响前十字带 (ACL) 负载机制,而不是降落期间的认知任务. 这些发现表明,将视觉和注意力挑战纳入ACL伤害预防计划.
科学领域:
- 生物力学 生物力学
- 运动医学 运动医学
- 发动机控制器的控制器
背景情况:
- 前十字带 (ACL) 损伤在降落过程中经常发生,特别是当视觉输入有限,认知需求高时.
- 了解在这些条件下影响ACL负荷的生物力学因素对于预防伤害至关重要.
研究的目的:
- 研究视力缺失和并发性认知任务对与ACL负载相关的预着陆和早期着陆生物力学的影响.
- 为了确定认知负载是否与视觉剥夺相比加剧了ACL负载.
主要方法:
- 34名大学生在8个条件下进行了单脚降落着陆,其中包括视力 (存在/缺席) 和认知负载 (没有,倒计数,语音计数或两者兼而有之).
- 分析了动力学和动力学数据,以评估着陆期间的关节力学和地面反应力.
主要成果:
- 视力缺失延迟了膝盖曲时间,并在提前着陆时增加了垂直地面反应力的峰值.
- 认知任务通常会减少膝盖曲角度;向后计数会降低初接触膝盖曲,而音调计数会降低膝盖曲速度和运动范围.
- 双重任务并没有使ACL负载变量恶化,并且导致垂直地面反应力的峰值减少,这表明了更保守的着陆策略.
结论:
- 视觉剥夺对ACL负载机制的影响比认知负载更大.
- 认知任务导致着陆策略的非线性,多层变化.
- 查和预防协议应整合视觉限制和次要任务,以模仿真实世界的运动条件,以评估ACL损伤风险.
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