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Effect of concrete block weight and wall height on electromyographic activity and heart rate of masons.

Authors
Anton-D; Rosecrance-JC; Gerr-F; Merlino-LA; Cook-TM
Source
Ergonomics 2005 Aug; 48(10):1314-1330
NIOSHTIC No.
20035161
Abstract
Work-related musculoskeletal disorders (MSDs) are common among construction workers, such as masons. Few interventions are available to reduce masons' exposure to heavy lifting, a risk factor for MSDs. The purpose of this study was to determine whether one such intervention, the use of light-weight concrete blocks (LWBs), reduces physiological loads compared to standard-weight blocks (SWBs). Using a repeated measures design, 21 masons each constructed two 32-block walls, seven courses (rows) high, entirely of either SWBs or LWBs. Surface electromyography (EMG), from arm and back muscles, and heart rate was sampled. For certain muscles, EMG amplitudes were slightly lower when masons were laying LWBs compared to SWBs. Upper back and forearm extensor EMG amplitudes were greater for the higher wall courses for both block weights. There were no significant differences in heart rate between the two blocks. Interventions that address block weight and course height may be effective for masons.
Keywords
Construction; Construction-equipment; Construction-industry; Construction-materials; Construction-workers; Muscle-function; Muscle-stress; Muscular-disorders; Musculoskeletal-system; Musculoskeletal-system-disorders; Masons; Education; Safety-climate; Safety-education; Safety-equipment; Safety-helmets; Safety-measures; Safety-monitoring; Safety-personnel; Safety-practices; Safety-programs; Injuries; Injury-prevention; Risk-analysis; Risk-factors; Back-injuries; Head-injuries; Head-protective-equipment; Health-hazards; Health-protection; Health-standards; Exposure-assessment; Exposure-chambers; Exposure-levels; Exposure-limits; Exposure-methods; Author Keywords: Musculoskeletal disorders; Construction; Intervention effectiveness; Masonry; Electromyography
Contact
D. Anton, Department of Occupational and Environmental Health, College of Public Health, The University of Iowa, Iowa City, IA 52242-5000
CODEN
ERGOAX
Publication Date
20050815
Document Type
Journal Article
Email Address
dan-anton@uiowa.edu
Funding Amount
6544463
Funding Type
Cooperative Agreement; Construction; Grant
Fiscal Year
2005
NTIS Accession No.
NTIS Price
Identifying No.
Cooperative-Agreement-Number-U60-CCU-317202; Grant-Number-T42-OH-008491
Issue of Publication
10
ISSN
0014-0139
Priority Area
Construction
Source Name
Ergonomics
State
MD; IA; CO
Performing Organization
The Center to Protect Workers' Rights
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