Association Between Handgrip Strength and Fatigability and Cognitive Performance in Adults Aged 65 and Older

BACKGROUND/AIMS: To explore the relationship between handgrip strength, fatigability, and cognitive function in older adults. MATERIALS AND METHODS: This cross-sectional study included 89 adults aged 65-85 who were receiving services from a physical therapy and rehabilitation center. Handgrip strength and fatigability were assessed using the Biopac Student Laboratory, and cognitive function was evaluated using the Standardized Mini-Mental State Examination (SMMSE). RESULTS: Handgrip strength was moderately correlated with cognitive function. There was no relationship between handgrip fatigability and cognitive function. The regression analysis indicated that an increase in grip strength would lead to a 0.59-point increase in the SMMSE score. It can be stated that the average SMMSE score of an individual with a secondary school education is 2.28, high school graduate is 2.94, and university graduate is 3.45 points higher than an individual with only a primary school education. These increases were found to be statistically significant. CONCLUSION: Our findings indicate that the decline in cognitive functions associated with aging should be considered alongside motor functions like muscle strength, and various individual factors.