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Titolo:
SUBJECTIVE AND OBJECTIVE EVALUATION OF SHOULDER MUSCLE FATIGUE
Autore:
OBERG T; SANDSJO L; KADEFORS R;
Indirizzi:
UNIV COLL HLTH SCI,DEPT BIOMECH S-55111 JONKOPING SWEDEN CHALMERS UNIV TECHNOL,DEPT APPL ELECTR S-41296 GOTHENBURG SWEDEN LINDHOLMEN DEV CTR GOTHENBURG SWEDEN
Titolo Testata:
Ergonomics
fascicolo: 8, volume: 37, anno: 1994,
pagine: 1323 - 1333
SICI:
0014-0139(1994)37:8<1323:SAOEOS>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
STATIC CONTRACTIONS; TRAPEZIUS MUSCLE; ENDURANCE; WELDERS; MYALGIA;
Keywords:
SHOULDER; TRAPEZIUS MUSCLE; LOCALIZED MUSCLE FATIGUE; EMG; FREQUENCY; PSYCHOPHYSICAL RATING SCALE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
T. Oberg et al., "SUBJECTIVE AND OBJECTIVE EVALUATION OF SHOULDER MUSCLE FATIGUE", Ergonomics, 37(8), 1994, pp. 1323-1333

Abstract

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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Documento generato il 30/09/20 alle ore 09:39:47