Analysis and quantitative myoelectric measurements of loads on the lumbar spine when holding weights in standing postures

Ten subjects executed a number of weight-holding and force-resisting work tasks while standing either upright or with their trunks in 30 degrees of forward flexion. All tasks involved sagitally symmetric body configurations and were performed isometrically. A simple calculation scheme was devised to...

Full description

Saved in:
Bibliographic Details
Published inSpine (Philadelphia, Pa. 1976) Vol. 7; no. 4; p. 390
Main Authors Schultz, A, Andersson, G B, Ortengren, R, Björk, R, Nordin, M
Format Journal Article
LanguageEnglish
Published United States 01.07.1982
Subjects
Adult
Biomechanical Phenomena
Electromyography
Electrophysiology
Humans
Lumbar Vertebrae - physiology
Male
Muscle Contraction
Physical Exertion
Posture
Pressure
Online AccessGet more information

Cover

More Information
Summary:Ten subjects executed a number of weight-holding and force-resisting work tasks while standing either upright or with their trunks in 30 degrees of forward flexion. All tasks involved sagitally symmetric body configurations and were performed isometrically. A simple calculation scheme was devised to predict the lumbar trunk muscle contraction forces and the lumbar spine compression forces required for execution of each task. The myoelectric activity was recorded quantitatively at eight sites over the lumbar trunk muscles and at four sites over the abdominal muscles. Good correlation was found between the predicted muscle contraction forces and the myoelectric activities.
ISSN:0362-2436
DOI:10.1097/00007632-198207000-00009