Effect of neck positions on hand grip strength in healthy normal adults / Moath Zayed Hawari ; Supervised Haytham Mohamed Elhafez , Doaa Ibrahim Amin , Hamada Eid Seef Hassan

Thesis (M.Sc.) - Cairo University - Faculty of Physical Therapy - Department of Basic Science

Objective: The purpose of this study was to assess the effect of the neck positions on hand grip strength in healthy normal adults. Material and Methods: 100 healthy subjects from both genders were participated in this study, they were recruited from faculty of physical therapy students, their age between (17-25 years), with mean age was 20.12 ± 1.43 years, mean height was 1.69 ± 0.07 meters while the mean weight was 69.3 ± 10.64 kilograms, and the mean value of Body Mass Index ratio was 24.1 ± 2.94. They were grouped into two groups equally according to gender. Hand grip strength and pinch strength were measured in seven different neck positions. Grip strength was measured by Jamar Hand held dynamometer, pinch strength was measured by Hydraulic Pinch Gauge and neck range of motion was measured by Cervical Range of Motion device. Results: t-test revealed that there was a significant statistical difference in hand grip strength and pinch strength when it measured in neutral position of the neck and in different position of the neck, and there was a significant statistical difference in hand grip strength and pinch strength in female and male groups. ANOVA test explained that there were no significant differences between studied grip strength at different neck positions for all subjects (F test = 0.665 and p<0.678). While ANOVA test for pinch strength explained significant differences between different neck positions for all subjects (F test = 26.286 and p<0.0001). Conclusion: Hand grip strength affected by changing the neck position in male and female healthy normal adults

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