| Subjective and objective evaluation of shoulder muscle fatigue. | |
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MedLine Citation:
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PMID: 7925256 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In order to relate EMG signs of localized muscle fatigue to subjectively perceived muscle fatigue, a study was undertaken on 20 healthy volunteers exposing their right trapezius muscle by raising the arm to 90 degrees of abduction. Every person performed two contractions: 0 kg hand load during 5 min and 2 kg hand load during 2.5 min. Surface EMG was recorded and analysed with respect to RMS amplitude and mean power frequency (MPF). Subjective muscle fatigue was estimated with a psychophysical rating scale (Borg's CR-10 Scale). At high load level we found a significant correlation between MPF and the CR-scores (r = -0.46), but at low load level there was no correlation. At high load level there was a linear decrease of MPF with increasing load dose, but at low load level the MPF did not change, despite significant subjective fatigue. There was a linear rise of the CR-score with increasing load dose, more pronounced at high load level. It was concluded, that at low load levels common in working life, MPF and subjective scores seem to provide different fatigue information. Moreover, the MPF did not seem to work as a valid estimator of muscle fatigue at this low load level. Caution is recommended if it is to be used in static low-load situations. |
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Authors:
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T Oberg; L Sandsjö; R Kadefors |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Ergonomics Volume: 37 ISSN: 0014-0139 ISO Abbreviation: Ergonomics Publication Date: 1994 Aug |
Date Detail:
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Created Date: 1994-11-21 Completed Date: 1994-11-21 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0373220 Medline TA: Ergonomics Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 1323-33 Citation Subset: IM; S |
Affiliation:
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Department of Biomechanics, University College of Health Sciences, Jönköping, Sweden. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Electromyography Female Humans Male Middle Aged Muscle Fatigue* / physiology Shoulder |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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