在一个基于脚的外骨架系统的代谢适应和相关生物力学在六次稳定状态行走过程中
Joseph F Seay1, Clifford L Hancock1, Isabella O'Keefe1
1United States Army Combat Capabilities Development Command Soldier Center, Natick, MA, USA.
Ergonomics
|August 28, 2024
概括
电动脚外骨架在行走过程中降低了氧气成本 (VO2),但适应性各不相同. 步行调整在整个会议中继续进行,这表明个体反应会影响外骨的有效性.
科学领域:
- 生物力学和人类运动
- 康复工程 康复工程 康复工程
- 可穿戴式机器人 穿戴式机器人
背景情况:
- 基于脚的外骨架在稳定状态行走时提供代谢优势.
- 个体对外骨使用的适应程度各不相同,这会影响获益的实现.
- 了解适应时间表对于优化外骨应用至关重要.
研究的目的:
- 评估使用动力 (EXOP) 和无动力 (EXNP) 脚外骨架的代谢和步行适应时间表.
- 为了比较EXOP,EXNP和没有设备 (NOEX) 条件之间的适应.
- 通过分析基于初始代谢适应的子组来研究外骨反应的变异性.
主要方法:
- 14名参与者在跑步机上以1.3米/秒的速度走了6次.
- 收集了新陈代谢 (VO2) 和生物力学数据.
- 参与者根据EXOP使用期间的初始VO2响应倾斜率分为小组.
主要成果:
- 与EXNP相比,EXOP显著减少了10%的VO2 (p ≤0.001),但与NOEX相比没有显著减少 (2.5%的减少,不显著).
- 没有观察到基于会话的VO2显著适应.
- 步行参数,如峰值膝盖 flexion (p = 0.042) 和步骤宽度 (p = 0.003) 显示了与会议相关的适应.
结论:
- 带动脚外骨架提供了与无动力设备相比的即时代谢益处.
- 走路适应在整个外骨使用过程中继续,这表明用户正在进行不断的调整.
- 小组分析揭示了各种各样的个人反应,突出了需要了解驱动这种变化的因素.
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