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Back muscle fatigue of younger and older adults with and without chronic low back pain using two protocols: A case-control study.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	da Silva, Rubens A. Vieira, Edgar R. Cabrera, Marcos Altimari, Leandro R. Aguiar, Andreo F. Nowotny, Alexandre H. Carvalho, Adriana F. Oliveira, Marcio R.
Description	Author Affiliation: da Silva RA ( Center for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance (LAFUP), Universidade Norte do Paraná (UNOPAR), 675 Paris Av, Londrina, PR, Brazil); Vieira ER ( Florida International University (FIU), Physical Therapy & Neuroscience Departments, Wertheims' Colleges of Nursing and Health Sciences & Medicine, 11200 SW 8th St., AHC3-430, Miami, FL, USA.); Cabrera M ( Universidade Estadual de Londrina (UEL), Rod. Celso Garcia Cid, 445 Km 380, Campus Universitário Londrina, PR, Brazil.); Altimari LR ( Universidade Estadual de Londrina (UEL), Rod. Celso Garcia Cid, 445 Km 380, Campus Universitário Londrina, PR, Brazil.); Aguiar AF ( Center for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance (LAFUP), Universidade Norte do Paraná (UNOPAR), 675 Paris Av, Londrina, PR, Brazil); Nowotny AH ( Center for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance (LAFUP), Universidade Norte do Paraná (UNOPAR), 675 Paris Av, Londrina, PR, Brazil); Carvalho AF ( Center for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance (LAFUP), Universidade Norte do Paraná (UNOPAR), 675 Paris Av, Londrina, PR, Brazil); Oliveira MR ( Center for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance (LAFUP), Universidade Norte do Paraná (UNOPAR), 675 Paris Av, Londrina, PR, Brazil)
Abstract	The purpose of this study was to compare back muscle fatigue of younger and older participants with and without chronic low back pain (CLBP). Twenty participants without and 20 with nonspecific CLBP participated in this study. Each group contained 10 younger (50% males; mean age: 31 ± 6 yrs) and 10 older adults (50% males; age mean: 71 ± 7 yrs). Two isometric fatigue protocols were presented randomly: (1) to maintain the unsupported trunk at the horizontal position while on a 45° Roman chair for a minute, and (2) to maintain a 10% of body weight box close to the trunk in the upright position for a minute. Surface electromyography (EMG) signals from the back (multifidus and iliocostalis) and one hip (biceps femoris) muscles were recorded bilaterally, and the median frequency fatigue estimate from linear regression slopes of the EMG time-series was computed. There were no significant (P > 0.05) age effects, and group-by-age interaction in both isometric and functional fatigue tasks. However, the CLBP groups (both younger and old) displayed more back fatigue than people without CLBP in both fatigue protocols (P < 0.01; effect size varying of d = 0.17-0.32). This study was sensitive to discriminate that individuals with CLBP did present significantly more pronounced EMG back fatigue than people without CLBP, in both younger and older adults. These results have significant clinical implications for low back pain rehabilitation programs with regard to endurance assessment in both younger and older.
File Format	HTM / HTML
ISSN	10506411
Issue Number	6
Volume Number	25
e-ISSN	18735711
Journal	Journal of Electromyography and Kinesiology
Language	English
Publisher	Elsevier
Publisher Date	2015-12-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Cardiology Back Muscles Physiology Low Back Pain Physiopathology Muscle Fatigue Adult Growth & Development Case-control Studies Female Humans Male Middle Aged Journal Article
Content Type	Text
Resource Type	Article
Subject	Neuroscience Neurology (clinical) Biophysics Sports Science

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Back muscle fatigue of younger and older adults with and without chronic low back pain using two protocols: A case-control study.

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