Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
권호 표지
DOI QR코드

DOI QR Code

The Study of Isometric Endurance Time by Task Type and Maximum Voluntary Contraction

작업형태 및 최대 수의적 수축에 따른 등척성 근지구력에 관한 연구

  • 심정훈 (동아대학교 대학원 산업시스템공학과) ;
  • 이상도 (동아대학교 기계산업시스템공학부)
  • Published : 2003.05.31
Download PDF
⟨ Previous Next ⟩

Abstract

This study was performed to investigate the isometric endurance time as percentages of maximum voluntary contraction. Electromyogram(EMG) and Borg's CR-I0 value were measured by push-pull-up-down tasks for 10 healthy males. The normalized EMG value and the MPF(mean power frequency) were used to estimate the muscle recruitment pattern and the development of muscle fatigue. The subjects exerted and maintained 5 levels of %MVC(maximum voluntary contraction) in $90^{\circ}$ shoulder flexion/ 180oelbow extension at sitting posture. The up-task showed the lower endurance time and higher Borg's CR-I0 value than the other task types. Comparing Rohmert's curve with the endurance time of task types. Rohmert's curve overestimated the endurance time of up-task and underestimated the endurance time of push-pull-down tasks. The normalized EMG value showed that muscles recruitment patterns were different from task types. The 4 muscles(biceps brachii muscle, tricep brachii muscle. middle deltoid muscle. trapezius muscle) recruitment patterns of up-task were higher than those of other tasks. The MPF value decreased with the endurance time, and the shift of MPF at up-task was larger than that of the other task types.

Keywords

References

  1. Dul, J .. Douwes, M.. and Smitt. P., 'Ergonomics guidelines for the prevention of discomfort of static postures based on endurance data.' Ergonomics. 37(5), 807-815, 1994 https://doi.org/10.1080/00140139408963690
  2. Garg, A., Hegrnann, K. T.. Schwoerer, B. J .. and Kapellusch, J. M.. 'The effect of maximum voluntary contraction on endurance times for the shoulder girdle,' International Journal of Industrial Ergonomics. 30. 103-113. 2002 https://doi.org/10.1016/S0169-8141(02)00078-1
  3. Gerdle. B., Edstrom. M.. and Rahm. M., 'Fatigue in the shoulder muscles during static work at two different torque levels.' Clinical Physiology. 13(5), 469-482. 1993 https://doi.org/10.1111/j.1475-097X.1993.tb00463.x
  4. Grandjean , E.. Fitting the Task to the Man. Taylor & Francis. London. 1988
  5. Hermans. V., and Spaepen. A. J., 'Muscular activity of the shoulder and neck region during sustained and intermittent exercise.' Clinical Physiology. 17(1).95-104. 1997 https://doi.org/10.1046/j.1365-2281.1997.01515.x
  6. Mamaghani, N. K.. Shimornura. Y., Iwanaga, K.. and Katsuura. T.. 'Changes in surface EMG and acoustic myogram parameters during static fatiguing contractions until exhaustion : influence of elbow joint angles.' Journal of Physiological Anthropology and Applied Human Science. 20(2). 131-140, 2001 https://doi.org/10.2114/jpa.20.131
  7. Mathiassen. S. E., and Ahsberg. E., 'Prediction of shoulder flexion endurance from personal factors.' International Journal of Industrial Ergonomics. 24. 315-329. 1999 https://doi.org/10.1016/S0169-8141(98)00039-0
  8. Mital. A.. Bishu, Ram R.. and Maniunath. S. G., 'Review and evaluation of techniques for determining fatigue allowance,' International Journal of Industrial Ergonomics, 8, 165-178, 1991 https://doi.org/10.1016/0169-8141(91)90017-G
  9. Nag. P. K., 'Endurance limits in different modes of load holding,' Applied Ergonomics. 22(3), 185-188, 1991 https://doi.org/10.1016/0003-6870(91)90158-E
  10. Nierninen. H., Takala. E-P.. Niemi. J.. and Viikari-Juntura, E., 'Muscular synergy in the shoulder during a fatiguing static contraction,' Clinical Biomechanics. 10. 309-317. 1995 https://doi.org/10.1016/0268-0033(95)00041-I
  11. NIOSH. Selected Topics in Surface Electromyograhpy for Use in The Occupational Setting Expert Perspectives, U.S.. D.H.H.S.. Pub., 122-144. 1992
  12. Rohmert, W.. Wangenheim, M., Minzer. J.. Zipp, P.. and Lesser. W.. 'A study stressing the need for a static postural force model for work analysis,' Ergonomics, 29(0). 1235-1249, 1986 https://doi.org/10.1080/00140138608967237
  13. Rose, L.. Ericson. M., Glimskar. B., Nordgren, B., and Ortengrend, R.. 'A model to determine pause needs after fatigue and pain reaction during work,' Advances in Industrial Ergonomics and Safety IV, Taylor & Francis. London. 1992
  14. Takala. E-P., Lammi. S., Nierninen. H., and Viikari-Juntura. E.. 'Electromyographic changes in the static holding test of the arm', International Journal of Industrial Ergonomics. 12. 85-90, 1993 https://doi.org/10.1016/0169-8141(93)90040-K
  15. van Dieen. J. H., and Oude Vrielink. H. H. E., 'The use of the relation between relative force and endurance time,' Ergonomics. 37(2), 231-243, 1994 https://doi.org/10.1080/00140139408963641

Cited by

  1. Muscle Strength Measurement using Shoulder and Upper Joint for Korean Young-aged vol.28, pp.3, 2009, https://doi.org/10.5143/JESK.2009.28.3.125
  2. Biomechanical Model of Hand to Predict Muscle Force and Joint Force vol.28, pp.3, 2009, https://doi.org/10.5143/JESK.2009.28.3.001