Evaluation of Air Consumption Efficiency in Structural Firefighters.

Journal of occupational and environmental medicine Pub Date : 2024-11-01 Epub Date: 2024-08-06 DOI:10.1097/JOM.0000000000003202

Emily L Langford, Haley C Bergstrom, Sarah N Lanham, Alyssa Q Eastman, Stuart Best, Xin Ma, Mark G Abel

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Abstract

Objective: This study examines variability in air consumption (AC) between firefighters (FF) working at a standardized pace, evaluates the relationship between air consumption efficiency (ACE) and work economy, identifies parameters associated with ACE, and explores the relationship between ACE and self-paced work rate.

Methods: FF completed randomized trials of an air consumption drill at a standardized pace while breathing through a self-contained breathing apparatus and a gas analyzer. A subsample completed another trial at a self-selected pace.

Results: The average AC variability (±1 standard deviation) was ~3.1 min of cylinder usage (13.7%). AC was positively associated with work economy and numerous physiological and anthropometric outcomes. No relationship was found between ACE and self-paced air consumption drill time.

Conclusions: FF working at higher internal strain demonstrated poorer ACE. Improving metabolic tolerance may extend the self-contained breathing apparatus' functional duration to enhance productivity and safety.

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评估结构性消防员的空气消耗效率。

研究目的本研究探讨了以标准化速度工作的消防员（FF）之间空气消耗量（AC）的差异；评估了 ACE（ACE）与工作经济性之间的关系；确定了与 ACE 相关的参数；并探讨了 ACE 与自我节奏工作率之间的关系：方法：FF 以标准化的速度完成了交流演练 (ACD) 的随机试验，同时通过 SCBA 和气体分析仪进行呼吸。一个子样本以自选速度完成了另一项试验：平均交流变异率（±1 SD）为气瓶使用时间约 3.1 分钟（13.7%）。AC 与工作经济性以及许多生理和人体测量结果呈正相关。在 ACE 和自定节奏 ACD 时间之间没有发现任何关系：结论：在较高内部应变下工作的 FF 的 ACE 较差。提高新陈代谢耐受性可延长 SCBA 的功能持续时间，从而提高生产率和安全性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Journal of occupational and environmental medicine

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