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用加权背心走路的代谢成本
David P Looney1, Elizabeth M Lavoie2, Sean R Notley3
1US Army Research Institute of Environmental Medicine, Natick, MA.
Medicine and science in sports and exercise
|January 31, 2024
概括
一个新的代谢模型术语准确地估计了军事人员加权背心负荷的能源成本. 这种更新的模型增强了美国陆军的战术应用的载荷运输决策援助 (LCDA).
科学领域:
- 运动生理学 运动生理学
- 生物力学 生物力学
- 军事科学 军事科学
背景情况:
- 美国陆军的载荷运输决策援助 (LCDA) 代谢模型被广泛用于预测下马战斗人员的生理成本.
- 现有的LCDA模型没有考虑到战术作战中常见的背心载荷运输的独特能量需求.
研究的目的:
- 开发和验证一种新的代谢模型术语,以准确估计加权背心对代谢率的影响.
- 改进军事任务规划,并为了解背心负载能量提供一般应用.
主要方法:
- 20名健康的成年人用加重背心 (0-66%的体重) 跨越各种速度,在跑步机上行走.
- 间接热量计测量了新陈代谢率,并衍生出了一个新的模型术语.
- 模型准确性在内部 (k倍交叉验证) 和外部对12个数据集 (264名参与者) 进行了验证.
主要成果:
- 与测量值相比,新的加权背心术语证明了统计学上相当的代谢率预测 (P < 0.01).
- 0.973 (当前研究) 和0.963 (参考数据集) 的高一致性相关系数 (CCC) 表明了很好的协议.
- 偏差是最小的 (-0.01 ± 0.54 W·kg-1和 -0.16 ± 0.59 W·kg-1对于当前和参考数据,分别).
结论:
- 更新后的LCDA代谢模型准确地预测了背包和背心载荷的代谢率.
- 使用加重背心的战术人员和运动员可以使用简化的LCDA计算器进行训练和营养计划.
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