Journal of International Academy of Physical Therapy Research (국제물리치료학회지)

International Academy of Physical Therapy Research (국제물리치료연구학회)
권호 표지
DOI QR코드

DOI QR Code

Correlation Between the Height and the Subjective Discomfort Ratings and Muscle Performance at performing the Lower Arm's Pronation and Supination according to the Changes in Height of Working Table

  • Received : 2012.05.18
  • Accepted : 2012.10.03
  • Published : 2012.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this study is to analyze the correlation between the stature and the muscle performance ratings and the subjective discomfort rations at performing lower arm's pronation and supination according to change sin the height of working table for more efficient performance at designing a working table and performing a work. For the purpose, this study conducted an experiment targeting 40 people in their 20s, who were classified into 4 groups each group composing 10 people at intervals of 5cm from the standard stature of 166.5cm. The experiment measured the maximum isometric pronation and the supination muscular power, and at measuring the factors, the heights of working tables were set as 800mm, 850mm, and 900mm. From the measurement results, it was found that the stature and the maximum muscular power was correlated. That is, as the experiment groups's average stature is higher, the maximum muscular power was higher. For the correlation between the motion patterns(pronation and supination) and the maximum muscular power, it was seen that the maximum muscular power was higher at performing the pronation than the supination. In the correlation between motion patterns and the subjective discomfort ratings, it was seen that the subjective discomfort rating was higher at performing the supination than the pronation. For the correlation between height adjustment and the subjective discomfort ratings, as the height of working table was lower, the subject discomfort rating was lower. Therefore there was no difference in the maximum muscular power according to the height changes of working table, but it was found that as the working table was higher, the user felt more comfortable.

Keywords

References

  1. Jang SR, Park HG. A study of the effects of the trunk angles and the upper An angles on workloads in the lifting work. J Korean consumer safety association 2009; 24(2): 69-75.
  2. Oh YS. A study on improvement and investigation of MSD for construction workers. Seoul national university 2008.
  3. Kim CH. A study of musculoskeletal disorders at automobile industries in korea. Korea industrial and systems engineering 2001; 24(67): 1-3.
  4. Yim CJ. Study on subjective symptoms and occupational characteristics for work related musculoskeletal disorders in the electronic industry. Hongik University 2003.
  5. Lee WY. Changes in fatigue and performance error as a function of standing workable height. Suseong College 1996.
  6. Bang HK. Study on the effective work envelope and the height of work desks for exercise of clothing construction. Sungshin women's university 2004.
  7. Korean gency for Technology and Standards. Kitchen equipment(sink cabinet ; cooking table ; gas table ; corner table and range table). 2011.
  8. Jeon HY. Study on heights of the tables and korean standard for the kitchen furniture. Hansung University 2004.
  9. David B. jenkins. Funtional anatomy. Hyunmoonsa 2003; 173-194.
  10. Jeong HG, Roh YM, Yim HW, Park CY, Jeong CH. A relationship between cumulative trauma disorder and the type of workstations and chairs in workers with repetitive motion tasks. Korean J Occupa Environ Med 2001; 13(2): 152-163.
  11. Lee JY. A study of workload change at various working postures, pause time and work method for an automobile assembly task. Incheon University 2002.
  12. Son MG, Yoon YS, Kim BO. Effect of elbow flexion on supination, pronation and grip Strengths. J Korean Acad Rehabil Med 2001; 25(4): 678-683.
  13. Son MG, An BH, Yoon YS. Effect of forearm position on the supination and pronation strengths and EMG activities of related muscles. J Korean Acad Rehabil Med 2002; 26(4): 432-433.
  14. Sim YH, Jung JH, Yoo JH. Effects of grip size on forearm pronation and supination. J Korean Soc of Occupa Ther 2009; 17(4): 45-56.
  15. Matsuoka J, Berger RA, Berqlund LJ, An KN. An analysis of symmetry of torque strength of the forearm under resisted forearm rotation in normal subjects. J Hand Surg 2006; 31(5): 801-805. https://doi.org/10.1016/j.jhsa.2006.02.019
  16. Korean Agency for Technology and Standards, "The fifth size-korea reports," 2004.
  17. Deusen JV, Brunt D: Assessment in occupational therapy and physical therapy, Philadelphia: WB Saunders 1997; 27-114.
  18. Borg G. A general scale to rate symptoms and feelings related to problems of ergonomic and organizational importance. G Ital Med Lav Ergon 2008; 30: 8-10.
  19. Broman H, Bilotto G, De Luca CJ. Myoelectric signal conduction velocity and spectral parameters. influence of force and time. J Appl Physiol 1985; 58: 1428-1437.
  20. Fisher MA. Root mean square voltage turns in chronic neuropathies is related to increase in fiber density. Muscle Nerve 1997; 20: 241-243. https://doi.org/10.1002/(SICI)1097-4598(199702)20:2<241::AID-MUS19>3.0.CO;2-5
  21. Richards LG. Posture effects on grip strength. Arch Phys Med Rehabil 1997; 78: 1154-1156. https://doi.org/10.1016/S0003-9993(97)90143-X
  22. Gordon KD, Pardo RD, Johnson JA, King GJ, Miller TA. Electromyographic activity and strength during maximum isometric pronation and supination efforts in healthy adults. J Orthop Res 2004; 22: 208-213. https://doi.org/10.1016/S0736-0266(03)00115-3
  23. Mathiowetz V, Rennells C, Donahoe L. Effect of elbow position on grip and key pinch strength. J Hand Surg 1985; 10A: 694-697.
  24. Shaaban H, Pereira C, Williams R, Lees VC. The effect of elbow position on the range of supination and pronation of the forearm. J Hand Surg Am 2008; 33(1): 3-8. https://doi.org/10.1177/1753193407087862