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Showing 3 results for Grip Strength
Measuring power hand grip strength in a sample of students aged 19-36 in Urmia
Teimour Allahyari, Sholeh Jafari, Hamidreza Khalkhali,
Volume 3, Issue 3 (12-2015)
Abstract

Background: Power and pinch hand grip strengths are major clinical and ergonomic parameters contributing to the hand muscle power. The data on hand grip strength measurements can have many benefits, including application in the design of hand tools. The present study was conducted to measure power hand grip strength among male and female students aged 19 to 36 using a Jamar Dynamometer and to compare their measurement data with the data obtained from other groups of the population.

Materials and Methods: The present cross sectional study was conducted on 234 male and female students aged 19-36 in Urmia University of Medical Sciences. Hand grip strength was measured using Jamar hand dynamometer and according to the Southampton protocol for adult grip strength measurement.

Results: The mean (±standard deviation of) hand grip strength calculated was 44.39 (±9.71) in the male students 20.48 (±5.86) in the female students. A high correlation was observed between the power hand grip strength in the left and right hands (r=0.94 and P<0.001) and a significant difference then between the power hand grip strength in the dominant and non-dominant hands. 

Conclusion: The findings of the present study and similar studies about power hand grip strength in the Iranian population can be used by ergonomists and manufacturers to improve the design of hand tools and the performance of tasks requiring hand muscle power.


Investigating the Effect of Wearing Medical Gloves on Grip Strength and Manual Dexterity
Fakhradin Ghasemi, Rashid Heidarimoghadam, Payam Khanlari,
Volume 9, Issue 3 (12-2021)
Abstract
Background and Objectives: Hospital and medical staff use medical gloves to protect themselves and their patients from infectious agents. Wearing gloves may reduce manual dexterity and grip strength and interfere with work performance. The aim of this study was to investigate the effect of wearing medical gloves on grip strength, manual dexterity, and perceived comfort.
Methods: 20 people (10 women, 10 men) participated in this study. Participants were tested in three gloveless modes, with latex gloves and with nitrile gloves with two tests, a 9-hole pegboard and a modified pegboard. Perceived comfort in working with gloves, wearing and removing gloves was also assessed using a subjective scale.
Results: The age range of participants was 20 to 40 years with an average of 29.45 years. There was a significant difference in manual dexterity between gloveless hands and nitrile gloves in the 9-hole pegboard test. In the modified pegboard test, gloveless hand manual dexterity was significantly different from both latex and nitrile gloves. The results also showed that wearing any type of glove significantly reduced the grip strength of individuals. The worst comfort rating was given to wearing gloves.
Conclusion: The results of this study showed that wearing gloves reduces manual dexterity and grip strength. A modified pegboard test is also recommended to assess the manual dexterity of medical gloves. Latex and Nitrile gloves are difficult to wear and should be considered in designs.

Sex Differences in Hand Anthropometric Dimensions, Grip Strength, and Manual Dexterity: A Study among Dental Students
Leila Rastgoo, Aysal Allahyari, Teimour Allahyari,
Volume 13, Issue 4 (1-2026)
Abstract
Objectives: In the dental profession, hands play a fundamental role in performing precise, fine movements and controlling specialized instruments. Hand anthropometric dimensions, grip strength, and manual dexterity are key factors in designing appropriate ergonomic tools. Given the physiological and anatomical differences between the two sexes, this study aimed to investigate sex differences in hand anthropometric dimensions, grip strength, and manual dexterity among dental students.
Methods: A cross-sectional descriptive-analytical study was conducted on 100 dental students (51 females and 49 males) at Urmia University of Medical Sciences, Urmia, Iran. Hand anthropometric dimensions were measured using a digital caliper, maximum grip strength was assessed using a Jamar dynamometer, pinch grip strength was measured using a SAEHAN pinch gauge, and manual dexterity was evaluated using the Roeder test. Data were analyzed using SPSS software 24 and the independent t-test.
Results: The mean height and weight of male participants were 177.6 ± 4.52 cm and 77.8 ± 10.92 kg, respectively, while those of female participants were 162.5 ± 5.32 cm and 63.1 ± 8.12 kg, respectively. Most hand anthropometric dimensions (finger length, width, and circumference) were significantly greater in males than in females (P < 0.001). The mean maximum grip strength was 45.2 ± 8.3 kg in males and 26.8 ± 6.1 kg in females (P < 0.001). Significant differences were also observed between the two types of pinch grip strength (P < 0.01). Although the mean manual dexterity score was slightly higher in females (23.4 ± 3.2) than in males (22.6 ± 3.8), this difference was not significant (P > 0.05).
Conclusion: The findings demonstrated significant sex differences in hand anthropometric dimensions and grip strength; however, no significant difference was observed in manual dexterity between the two sexs. These results emphasize the need to design dental instruments tailored to the anthropometric characteristics of each sex to reduce the risk of musculoskeletal disorders.

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