Effects of simulated firefighting and asymmetric load carriage on firefighter obstacle crossing performance.

Autor: Angelini MJ; University of Illinois, Dept. of Mechanical Science and Engineering, Urbana-Champaign, IL, USA., Kesler RM; University of Illinois, Illinois Fire Service Institute, Urbana-Champaign, IL, USA., Petrucci MN; University of Illinois, Dept. of Mechanical Science and Engineering, Urbana-Champaign, IL, USA., Rosengren KS; University of Wisconsin, Dept. of Psychology, Madison, WI, USA., Horn GP; University of Illinois, Dept. of Mechanical Science and Engineering, Urbana-Champaign, IL, USA; University of Illinois, Illinois Fire Service Institute, Urbana-Champaign, IL, USA., Hsiao-Wecksler ET; University of Illinois, Dept. of Mechanical Science and Engineering, Urbana-Champaign, IL, USA. Electronic address: ethw@illinois.edu.
Jazyk: angličtina
Zdroj: Applied ergonomics [Appl Ergon] 2018 Jul; Vol. 70, pp. 59-67. Date of Electronic Publication: 2018 Feb 20.
DOI: 10.1016/j.apergo.2018.02.006
Abstrakt: Slips, trips, and falls (STF) of firefighters may occur while traversing stationary obstacles. STF risk may be amplified by fatigue from firefighting and carrying an asymmetric load. Vertical and horizontal clearances of the lead (VCL, HCL) and trailing (VCT, HCT) foot and contact with a 30 cm obstacle were examined in 24 firefighters. We examined the impact on obstacle crossing performance due to three exercise protocols (treadmill walking or simulated firefighting in an environmental chamber, and simulated firefighting in a live-fire burn building) and carrying a hose load on the right shoulder. Post-activity fatigue resulted in significant decreases in HCL and VCT. Adding a hose load did not affect choice of lead/trailing foot, but did significantly decreased HCL and increased VCL. The hose load amplified acute fatigue effects by causing a sharper decrease in both VCL and VCT. Clearances were significantly impacted by interaction effects of exercise protocol type and acute fatigue. HCL decreased and VCL remained consistent following both simulated firefighting tasks, but HCL remained unchanged and VCL increased following the treadmill protocol. Contact errors increased with fatigue and load, and more errors occurred following simulated firefighting task protocols compared to treadmill walking. Our findings suggest that both acute fatigue and carrying an additional load can cause decrements in firefighter movement, which may place a firefighter at greater STF risk. Simulated firefighting testing protocols may have greater impact on movement performance than treadmill walking. Knowledge of these results may assist in the development of a reliable, laboratory based, and standardizable simulated firefighting exercise protocol.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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