Introduction: The Nine-Hole Peg Test is one of the most used tools for assessing hand dexterity. When participants repeat the nine-hole peg test, it is referred to as the Repeated Nine-Hole Peg Test, which is a modified version of the original test used to assess fatigue. Purpose: The aim of measuring the repeated Nine-Hole Peg Test was to determine how age influences the performance of ten repetitions of the test in a row. We also sought to investigate the level of fatigue experienced by individuals during the test and identify which age group would exhibit a more pronounced learning effect. Methods: The study included 60 adult participants divided into two groups. The first group consisted of 30 younger healthy individuals (aged 20-35). The second group included 30 older healthy individuals (aged 65-80). All participants performed ten continuous repetitions of the Nine-Hole Peg Test with their dominant hand. Fatigue and test difficulty were assessed by the participants using the Borg and Likert scales. Results: In the case of older individuals, we found that they have higher average absolute time values compared to younger subjects, and there are statistically significant differences between the groups. mean relative time values (regarding the first performance) were lower in older subjects than in younger ones. Female subjects had lower absolute values compared to male subjects. For these two findings, however, there are no statistically significant differences between the groups. The assessment of the feeling of effort and the assessment of difficulty were rated slightly lower in the younger population than in the older population. The Borg scale for the feeling of effort was between "medium easy" and "slightly harder effort", and the Likert scale for the assessment of difficulty was estimated between 1.4-3 for both groups of subjects, which could be expressed by the description "easy" and "medium difficult". We also found that the effect of learning is greater for older people than for younger people, but the difference is not statistically significant. Discussion and Conclusion: As expected, older participants had higher absolute time values. The relative time values did not differ significantly between the groups. Future research should consider including a larger sample size, expanding the age groups, and investigating the impact of occupation, hobbies, computer use, and other devices requiring manual dexterity.
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