自给式呼吸器和防火服对最大摄氧量的影响。

Effects of the self-contained breathing apparatus and fire protective clothing on maximal oxygen uptake.

作者信息

Dreger Randy W, Jones Richard L, Petersen Stewart R

机构信息

Faculty of Physical Education and Recreation, University of Alberta, Edmonton, Alberta, Canada.

出版信息

Ergonomics. 2006 Aug 15;49(10):911-20. doi: 10.1080/00140130600667451.

DOI:10.1080/00140130600667451

PMID:16803723

Abstract

To examine the effects of firefighting personal protective ensemble (PPE) and self-contained breathing apparatus (SCBA) on exercise performance, 12 males completed two randomly ordered, graded exercise treadmill tests (GXTPPE and GXTPT). Maximal oxygen consumption (VO2max) during GXTPPE was 17.3% lower than the GXTPT in regular exercise clothing (43.0 +/- 5.7 vs. 52.4 +/- 8.5 ml/kg per min, respectively). The lower VO2max during the PPE condition was significantly related (r = 0.81, p < 0.05) to attenuated peak ventilation (142.8 +/- 18.0 vs. 167.1 +/- 15.6 l/min), which was attributed to a significant reduction in tidal volume (2.6 +/- 10.4 vs. 3.2 +/- 0.4 l). Breathing frequency at peak exercise was unchanged (55 +/- 7 vs. 53 +/- 7 breaths/min). The results of this investigation demonstrate that PPE and the SCBA have a negative impact on VO2max. These factors must be considered when evaluating aerobic demands of fire suppression work and the fitness levels of firefighters.

摘要

为研究消防个人防护装备（PPE）和自给式呼吸器（SCBA）对运动表现的影响，12名男性完成了两项随机排序的分级运动跑步机测试（GXTPPE和GXTPT）。在GXTPPE期间的最大耗氧量（VO2max）比穿着常规运动服装的GXTPT低17.3%（分别为43.0±5.7与52.4±8.5毫升/千克每分钟）。PPE条件下较低的VO2max与峰值通气量减弱显著相关（r = 0.81，p < 0.05）（142.8±18.0与167.1±15.6升/分钟），这归因于潮气量的显著减少（2.6±10.4与3.2±0.4升）。运动峰值时的呼吸频率没有变化（55±7与53±7次/分钟）。本研究结果表明，PPE和SCBA对VO2max有负面影响。在评估灭火工作的有氧需求和消防员的体能水平时，必须考虑这些因素。