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MAP20071022361Oberg, TommySubjective and objective evaluation of shoulder muscle fatigue / Tommy Oberg, Leif Sanksjö and Roland KadeforsSumario: 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 90º 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)En: Ergonomics. - London and Washington. - Vol. 37, nº 8, August 1994 ; p. 1323-13331. Ergonomía. 2. Fatiga. 3. Fuerza muscular. 4. Extremidades superiores. 5. Psicofísica. 6. Electromiografía. I. Sandsjö, Leif. II. Kadefors, Roland. III. Título. IV. Título: Ergonomics.