Correlation between Hand Grip Strength and Duration in Computer Operators
Background: Musculoskeletal disorders are the most common self-reported work related illness. Highly repetitive jobs with grasping of the hands, repetitive bending of the wrist, vibration and localized mechanical pressure are the contributing factors towards the occurrence of repetitive stress injury. Many users complain about wrist fatigue, discomfort or pain after typing. This study aims to find out whether long work duration affects the hand grip strength in computer operators affecting his performance in the long run.
1. To determine the hand grip strength in computer operators.
2. To determine the duration of work in computer operators.
3. To see whether there is any relation between the hand grip strength and the work duration in computer operators
Methods: A cross sectional descriptive study was undertaken.
174 subjects consisting of 87 computer operators and 87 sex and age matched normal individuals were taken for the study. An informed consent was obtained from the subjects. The baseline parameters were taken. The hand grip strength for both the dominant and non-dominant hand was measured using a JAMAR dynamometer. The number of years of work was also recorded.
• Student's t-test has been used to find the age, gender, height, weight, hand length and hand width distribution within and between the study and control group.
• The comparison between the hand grip strength in computer operators and the control group was done using Students t-test.
• Pearson correlation co-efficient to find the relationship between the hand grip strength with the number of years of work.
Results: There was a significant negative correlation between the hand grip strength and 11- 15 years of work. A significant decrease was noted in the hand grip strength of the dominant side in the study group in comparison to the control group.
Conclusion: It was concluded that after 10 years of work there was a decrease in the grip strength in both the hands which could be attributed to the microscopic tears in the soft tissues and articular wear and tear over the years due to repetitive work.
- Margareta Nordin and Frankel VH. Basic Biomechanics of the Musculoskeletal System. Third edition. Lipincott Williams & Wilkins; 2001.
- Ross CH and Rösblad B (2002) Norms for grip strength in children aged 4–16 years. Acta Paediatrica, 91 (6) : 617-625.
- Malina RM, Zavaleta AN and Little BB (1987) Body size, fatness, and leanness of Mexican American children in Brownsville, Texas: changes between 1972 and 1983. Am J Public Health, 77(5): 573-577.
- Norkin CC and Levangie KP. Joint Structure and Function. Third edition. Jitendar P: Jaypee Brothers Medical Publishers; 2001.
- Kulaksiz G, Gozil R. The effect of hand preference on hand anthropometric measurements in healthy individuals. Ann Anat 2002; 184: 257-65.
- Anneli Peolsson, Rune Hedlund, Brigitta Oberg; Inter and Intra-tester Reliability and Reference Values for Hand Strength; Journal of Medical Rehabilitation 2001; 33: 36-41.
- Jason Shea C.S.C.S., PES; The Importance Of Grip Strength; Journal of Strength and Conditioning Research (2007, 21(3), 923-929).
- Hillman TE, Nunes QM, Horby ST, Stanga Z, Neal KR, Rowland BJ. et al a practical exposure for hand dynamometry in the clinical setting. Clinical nutrition. 2005 April; 24(2): pg 224-8. 1981 Ng G Y F, Fan A C C. Does elbow position affect strength and reproducibility of power grip measurements? Physiotherapy. 2001, 87(2): pg 68-72
- Suman Singh and Jyoti Wadhwa. Impact of Computer Workstation Design on Health of the Users. Journal of Human Ecology, 20(3); 165-170(2006).
- J. Wahlstro M: Ergonomics, Musculoskeletal Disorders and Computer Work; Occupational Medicine 2005; 55:168–176
- Jensen C, Finsen L, Søgaard K, et al. Musculoskeletal symptoms and duration of computer and mouse use. Int J Ind Ergonomics 2002;30 :265–275.
- Punnett L, Bergqvist U. Visual display unit work and upper extremity musculoskeletal disorders. Stockholm:National Institute for Working Life, 1997.
- Fess Moran C. Clinical Assessment Recommendations, Indianapolis. American Society of Hand Therapists Monograph; 1981
- Dr.Mandara Savage et al; The Effect of Rest Periods on Hand Fatigue and Productivity; Journal of Industrial Technology; Volume 22, Number 3; 2006.
- D.C. Metgud et al ; An Ergonomic Study Of Women Workers In A Woolen Textile Factory For IdentifecationOf Health Related Problems ; Indian Journal Of Occupational And Environmental Medicine 2008 ; volume 12 issue 1
- Dal Monte A., Dragan I.; The Olympic Book of Sports Medicine. Pp 109. Cambridge, Ma 1988.
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