Normative data of grip and pinch strengths in healthy adults of Iranian population

Background Measuring and comparing grip and pinch strengths with their normative data is a valid method to detect intensity of the numerous damages of hand. This research was carried out with the aim of establishing normative data of grip strength and three types of pinch strengths (Tip, Key and Palmar) in healthy Iranian adults. Methods In this cross-sectional study, the study population was formed of 1008 people (526 men and 482 women) from healthy Fars race adults of over 20 years old in five cities of Iran. American Society of Hand Therapists (ASHT) recommendations were followed to establish normative data of grip and pinch strengths. Normative data of grip and pinch strengths were developed based on sex, 12 different age groups and dominant and non-dominant hands. Jamar dynamometer and Seahan pinch gauge were used to measure grip and pinch strengths, respectively. Results Normative data of grip and pinch strengths were provided. Grip and pinch strengths of men were significantly stronger than women. The maximum grip strength of men was obtained in the group of 20-24 years and among women it was in the age group 35-39 years. Regardless of gender, grip and pinch strengths were declined with aging. Conclusion Normative data of grip and pinch strengths were developed for Iranian population.