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A Study on the Biodynamics of Sagittal Plane Lifting and Materials Handling.

Authors
Dowling-KC; Glickman-FR; Tichauer-ER
Source
NIOSH 1977 Oct:52 pages
Link
NIOSHTIC No.
00075208
Abstract
A repeated measures factorial design was employed to investigate the effects of technique, height, distance and load moment on electromyographic (EMG) mean amplitude (average effort) and EMG area (total effort) during standing lifting tasks. Another experiment with repeated measures on all factors was used to study the effects of direction of box movement and load moment on EMG mean amplitude and EMG area during seated lifting tasks. Thirty males and thirty females performed all combinations of standing and seated lifts while the EMG activity of the sacrospinalis, glutei and hamstrings was recorded. For standing tasks, the main effects of load moment, height, distance and technique were significant for both EMG mean and EMG area for both sexes, the exceptions being the sacrospinalis mean activity for males, and the EMG areas for the glutei and hamstrings of females, which only approached significance. In seated lifting tasks, load moment had significant effects on all EMG means and areas for both sexes. Direction of box movement did not, in most cases, have a significant effect upon the dependent variables. Findings are discussed as they relate to the design and analysis of manual materials handling tasks. (Contract No 099-74-0057)
Keywords
NIOSH-Contract; Contract-099-74-0057; Ergonomics; Sex-factors; Muscle-function; Musculoskeletal-system;
Publication Date
19771001
Funding Type
Contract;
Fiscal Year
1978
NTIS Accession No.
PB83-101204
NTIS Price
A05
Identifying No.
Contract-099-74-0057
Priority Area
Special Populations; Work Environment and Workforce; Musculoskeletal Disorders of the Upper Extremities; Disease and Injury;
Source Name
Physiology and Ergonomics Branch, NIOSH, Cincinnati, Ohio
State
OH;
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