Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16494
Title: Comparing the physiological and perceptual responses of construction workers (bar benders and bar fixers) in a hot environment
Authors: Wong, DPL
Chung, JWY
Chan, APC 
Wong, FKW 
Yi, W
Keywords: Construction work
Heat stress
Oxygen consumption
Issue Date: Dec-2014
Publisher: Pergamon Press
Source: Applied ergonomics, Nov. 2014, v. 45, no. 6,, p. 1705–1711 How to cite?
Journal: Applied ergonomics 
Abstract: This study aimed to (1) quantify the respective physical workloads of bar bending and fixing; and (2) compare the physiological and perceptual responses between bar benders and bar fixers. Field studies were conducted during the summer in Hong Kong from July 2011 to August 2011 over six construction sites. Synchronized physiological, perceptual, and environmental parameters were measured from construction rebar workers. The average duration of the 39 field measurements was 151.1 ± 22.4 min under hot environment (WBGT = 31.4 ± 2.2 °C), during which physiological, perceptual and environmental parameters were synchronized. Energy expenditure of overall rebar work, bar bending, and bar fixing were 2.57, 2.26 and 2.67 Kcal/min (179, 158 and 186 W), respectively. Bar fixing induced significantly higher physiological responses in heart rate (113.6 vs. 102.3 beat/min, p < 0.05), oxygen consumption (9.53 vs. 7.14 ml/min/kg, p < 0.05), and energy expenditure (2.67 vs. 2.26 Kcal/min, p < 0.05) (186 vs. 158 W, p < 0.05) as compared to bar bending. Perceptual response was higher in bar fixing but such difference was not statistically significant. Findings of this study enable the calculation of daily energy expenditure of rebar work.
URI: http://hdl.handle.net/10397/16494
ISSN: 0003-6870
EISSN: 1872-9126
DOI: 10.1016/j.apergo.2014.06.002
Rights: © 2014 Elsevier Ltd and The Ergonomics Society. All rights reserved.
NOTICE: this is the author’s version of a work that was accepted for publication in Applied ergonomics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. The definitive version Wong, D. P. L., Chung, J. W. Y., Chan, A. P. C., Wong, F. K. W., & Yi, W. (2014). Comparing the physiological and perceptual responses of construction workers (bar benders and bar fixers) in a hot environment. Applied ergonomics, 45(6), 1705-1711 is available at https://doi.org/10.1016/j.apergo.2014.06.002
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