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Use of lumbar trunk muscles in isometric performance of mechanically complex standing tasks
Author(s) -
Schultz Albert,
Haderspeck Karol,
Warwick David,
Portillo Deborah
Publication year - 1983
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1002/jor.1100010111
Subject(s) - isometric exercise , trunk , lumbar , electromyography , lumbar spine , biomechanics , back muscles , physical medicine and rehabilitation , anatomy , computer science , medicine , physical therapy , surgery , biology , ecology
Ten subjects performed 25 tasks isometrically while standing. Those tasks imposed substantial extension, lateral bending, and twisting moments on the lumbar spine. Mechanically complex trunk muscle actions were called for to resist those moments. Biomechanical model analyses were used to predict the trunk muscle contraction forces needed to perform those tasks, and surface myoelectric activities were measured to validate those predictions. Predictions and measurements were linearly well correlated.