Faculty of Education, Arts and Sports, Western Norway University of Applied Sciences, Norway.
Institute of Health Sciences, Kristiania University College, Norway.
Int J Occup Saf Ergon. 2020 Mar;26(1):173-180. doi: 10.1080/10803548.2019.1573013. Epub 2019 Mar 30.
. Physiologic demands of five common tasks in firefighting have been examined. . Eight male volunteers, dressed up as smoke divers (+21 kg extra load), carried out the following tasks at constant pace for 5 min: walking at 1.4 m·s, walking (all walks at the same speed) while carrying a 10-kg ladder, walking carrying two hose packs of 16 kg together, walking carrying a 32-kg spreader tool and, finally, climbing up and down a ladder at a preset pace. A 5-min break separated each exercise. The heart rate, oxygen uptake and lung ventilation were measured continuously, and the blood lactate concentration was recorded after each task. . The end-exercise heart rate rose from 108 to 180 bpm from the first to last task, blood lactate concentration rose from 1 to 7 mmol·L, oxygen uptake rose from 19 to 48 ml·kg min and lung ventilation rose from 38 to 124 L·min. . Walking was an easy task even when dressed up as a smoke diver. Adding loads increased demands; ladder climbing taxed >90% of the subjects' aerobic power. . The physiologic demands varied considerably between different tasks.
. 已对消防工作中的五项常见任务的生理需求进行了研究。. 8 名男性志愿者穿着消防服（负重 21 公斤），以恒定的速度进行以下任务 5 分钟：步行 1.4 米/秒，携带 10 公斤梯子行走（所有步伐速度相同），携带两个 16 公斤的水带包一起行走，携带 32 公斤的扩张器工具行走，最后，按照设定的节奏爬上爬下梯子。每次练习之间休息 5 分钟。连续测量心率、耗氧量和肺通气量，并在每次任务后记录血乳酸浓度。. 运动结束时的心率从第一项任务的 108 次/分上升到最后一项任务的 180 次/分，血乳酸浓度从 1 毫摩尔/升上升到 7 毫摩尔/升，耗氧量从 19 毫升/公斤·分钟上升到 48 毫升/公斤·分钟，肺通气量从 38 升/分钟上升到 124 升/分钟。. 即使穿着消防服，步行也是一项轻松的任务。增加负荷会增加需求；爬梯子会使超过 90%的测试对象的有氧能力达到极限。. 不同任务的生理需求差异很大。
