title: An electromyographic investigation of postural fatigue in low back pain--a preliminary study.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001416:Back Pain / Q000503:physiopathology*; D004576:Electromyography; D006801:Humans; D008875:Middle Aged; D009132:Muscles / Q000503:physiopathology*; D011187:Posture