Ergonomic injury control in high frequency lifting tasks.
Asfour-SS; Khalil-TM; Genaidy-AM; Acein-M; Jomoah-IM; Koshy-JG; Tritar-M
Industrial Engineering Department, University of Miami, Coral Gables, Florida, 1991 Nov; :1-409
A series of experiments was designed to determine the endurance limits and the physiologic fatigue limits of subjects engaged in performing lifting tasks from floor to table height, table to shoulder height and shoulder to reach height. A total of 72 industrial workers participated in the study. A mixed design was used in each height. The weight of load and frequency of lift were treated as within subject factors, while the subject age group was used as a between subject factor. The results showed that the endurance time of individuals decreased with the increased frequency of lift and the amount of load lifted. The highest endurance time values were recorded for the table to shoulder lifting height, while the shoulder to reach height had the lowest endurance time values. Age significantly affected endurance time for only the floor to table lift. Heart rate, oxygen consumption and the ratings of perceived exertion were not affected by age. The average endurance time across all loads and frequencies for floor to table lifting height was 319 minutes. The lifting frequencies could not be sustained for an 8 hour period by 99% of the subjects tested.
NIOSH-Grant; Musculoskeletal-system; Manual-lifting; Ergonomics; Manual-materials-handling; Muscle-function; Physiological-measurements
Industrial Engineering University of Miami P.O. Box 248294 Coral Gables, Florida 33124
Final Grant Report
NTIS Accession No.
Industrial Engineering Department, University of Miami, Coral Gables, Florida
University of Miami, Coral Gables, Florida