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A new method for calculating saddle seat height with an emphasis on optimal posture based on trigonometric relations

Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Introduction. Based on the literature, the ergonomic saddle chair provides the most appropriate posture for users. Determination of the seat height is critical to establish the proper posture, carried out using various methods of anthropometry. This study aimed to develop a simple and applied method for determining the saddle seat height with an emphasis on appropriate posture. Methods. In this study, anthropometric dimensions including weight, body height, popliteal height and seat height at 135° knee angle in 150 male and female dentists were measured. In the laboratory, to determine the ‘acetabuloischial number’, 25 male and female natural hip bones were measured. The mean saddle-chair height with knee angle of 135° was then compared by two different methods, field measurement and the new calculation method. Results. The results showed a strong correlation between data gathered from the two different methods, the field measurement and the new calculation method (98%), and Cronbach’s α from the intraclass correlation was equal to 0.994 (p < 0.05). This indicated that the two methods produced similar results. Conclusion. The new method can be applied to calculate the optimal height of the saddle seat based on body height and popliteal height.
Rocznik
Strony
565--571
Opis fizyczny
Bibliogr. 22 poz.
Twórcy
autor
  • Shiraz University of Medical Sciences, Iran
autor
  • Shiraz University of Medical Sciences, Iran
autor
  • Shiraz University of Medical Sciences, Iran
autor
  • Shiraz University of Medical Sciences, Iran
  • Shiraz University of Medical Sciences, Iran
autor
  • Shiraz University of Medical Sciences, Iran
Bibliografia
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  • 2. Erns E. Medizinisch richtiges sitzen, gibt es das? [Medically correct sitting, does it exist?]. Wien Med Wochenschr. 1992;142(22):513-516.
  • 3. Fenety PA, Putnam C, Walker JM. In-chair movement: validity, reliability and implications for measuring sitting discomfort. Appl Ergon. 2000;31:383–393. doi: 10.1016/S0003-6870(00)00003-X.
  • 4. Hartvigsen J, Leboeuf-Yde C, Lings S, et al. Is sitting-while-at-work associated with low back pain? A systematic critical literature review. Scand J Public Health. 2000;28:230-239.
  • 5. Callaghan JP, McGill SM. Low back joint loading and kinematics during standing and unsupported sitting. Ergonomics. 2001;44(3):280–294. doi: 10.1080/00140130118276.
  • 6. Sanders MS, McCormic EJ. Human factors in engineering and design. 7th ed. New York (NY): McGraw-Hill Education; 1993.
  • 7. Niu J, Li Z. Using three-dimensional (3D) anthropometric data in design. In: Preedy VR, editor. Handbook of anthropometry: physical measures of human form in health and disease. Vol. 1. New York (NY): Springer; 2012. p. 3001–3002.
  • 8. Shackel B, Chidsey KD, Shipley P. The assessment of chair comfort. In: Grandjean E, editor. Sitting posture. London: Taylor & Francis; 1976. p. 189-195.
  • 9. Zhang L, Helander M, Drury C. Identifying factors of comfort and discomfort in sitting. Hum Factors. 1996;38(3):377-389.
  • 10. Lueder R. Adjustability in context. In: Lueder R, Noro K, editors. Hard facts about soft machines: the ergonomics of seating. London: Taylor & Francis; 1994. p. 25-35.
  • 11. Mandal AC. The correct height of school furniture. Physiotherapy. 1984;70(2):48-53.
  • 12. Noro K. Sashaku: a user-oriented approach for seating. In: Lueder R, Noro K, editors. Hard facts about soft machines: the ergonomics of seating. London: Taylor & Francis; 1994. p. 7–28.
  • 13. Diffrient N, Tilley AR, Harman D. Human scale 4/5/6. Cambridge (MA): MIT Press; 1981.
  • 14. Mououdi MA. The determination of static anthropometry characteristics for designing and evaluating the comfort of saddle chair. Iran Occup Health. 2012;9(4): 24–29.
  • 15. Tillman B, Regal D, Parsons S. Man-systems integration standards: NASA-STD-3000. Vol. 1, 2, and 3. Revision B. NASA-Johnson space center. Houston TX 77058. July 1995:54-57.
  • 16. White TD, Black MT, Folkens PA. Human osteology. 3rd ed. San Diego (CA): Academic Press; 2012.
  • 17. Silverman RA. Calculus with analytic geometry. 1985. Alemzadeh AA, translator. Tehran: Phoenix Publishing. 1387; Vol.1: 78.
  • 18. White TD, Folkens PA. The human manual bone. Amsterdam: Elsevier; 2005.
  • 19. Field H. Contributions to the anthropology of Iran. Vol 29. Chicago: Field Museum Press; 1939. doi: 10.5962/bhl.title.3355
  • 20. Pheasant S. Bodyspace: anthropometry, ergonomics and the design of work. 2nd ed. London: Taylor and Francis; 2003.
  • 21. Roebuck JJA, Kroemer KHE, Thomson WG. Engineering anthropomethry methods. New York (NY): Wiley; 1975.
  • 22. Tichauer E. The biomechanical basis of ergonomics: Anatomy applied to the aesign of work situations. New York (NY): Wiley; 1978.
Uwagi
PL
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-86350750-c1a5-4208-84a1-7ac3b24bdc8a
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