Effect of hand posture on maximum force grip and discomfort in tractor drivers

Authors

  • Arghavani, Farshad Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj,
  • Baigi, Foozieh Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj
  • Bidarpoor, Farzam Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj
  • Ebrahimi, Kamal Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj,
  • Giahi, Omid Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj,
  • javanmardi, Karim Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj,
Abstract:

Maintain the best posture to use the maximum Force Grip is important in the design of work stations. The objective of this study was to measure grip strength and perceived discomfort at different hand positions and to investigate the effects of hand positions on grip strength and perceived discomfort among24 tractor drivers in Sanandaj. The maximum force grip in different Postures by hydraulic dynamometer and the discomfort by visual analog scale of 10 degrees measured and recorded, After collecting and entering data into SPSS 16 using Chi-square and ANOVA tests were conducted to investigate the relationships between variables. Between hand direction by maximum force grip (p=0.01) and discomfort rate (p=0.0001) significant relationship was found. Between hand-shoulder distance by maximum force grip (p=0.001) and perceived discomfort (p=0.0001) significant relationship was found. Highest force grip in Angles greater than 90 degrees was achieved. Highest amount of force grip (43.1kg.force) in135degree hand position and 100%hand-shoulder from arm reach was found. Highest amount of perceived discomfort(58.8) in45degree hand position and 50%hand-shoulder from arm reach was found. Amount of perceived discomfort and hand direction angles affected on maximum force grip. So should note that the design of manually devices and controls. Obviously, if these ergonomic factors do not observe in design, Consequences such as increased accidents, increased fatigue and musculoskeletal problems will follow.

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volume 6  issue None

pages  122- 128

publication date 2016-02

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