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01-06-2004 | Original Article

EMG recovery and ratings after back extensor fatigue in patients with lumbar disc herniation and healthy subjects

Authors: Åsa Dedering, Britt Elfving, Gunnar Németh

Published in: European Journal of Applied Physiology | Issue 1-2/2004

Abstract

This prospective study aimed to examine whether patients with lumbar disc herniation, before and after surgery, showed impaired recovery from fatigue measured with EMG and subjective ratings as compared to healthy subjects. Forty-three patients due for, and after, lumbar disc surgery and 60 healthy subjects were fatigued using a modified Sørensen’s test. Recovery of back extensor muscles was assessed using electromyography and the Borg scale ratings at 1, 2, 3, and 5 minutes of recovery, and was further analyzed using an exponential time-dependence model. The patients completed four questionnaires: the Oswestry, the Roland-Morris, a self-efficacy scale and the SF-36. The exponential time-dependence model was successful for 14 of the 43 patients and 57 of the 60 healthy subjects. The patients for whom the model succeeded had significantly better scores on the questionnaires than those for whom the model was unsuccessful. Specific items related to standing and lifting were identified. The patients’ recovery was impaired compared to the healthy subjects, as determined by use of the exponential time-dependence model. The combination of fatigue and recovery measures was reflected in the questionnaire scores and is therefore important for evaluating patients with lumbar disc herniation.

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Title: EMG recovery and ratings after back extensor fatigue in patients with lumbar disc herniation and healthy subjects
Authors: Åsa Dedering
Britt Elfving
Gunnar Németh
Publication date: 01-06-2004
Publisher: Springer-Verlag
Published in: European Journal of Applied Physiology / Issue 1-2/2004
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-004-1065-x

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EMG recovery and ratings after back extensor fatigue in patients with lumbar disc herniation and healthy subjects

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