Objective: This study aims to analyse the association between grip strength and physical function indicators related to falls in older adults aged 65 and over, using data from the National Fitness 100 programme, and to provide a basis for the assessment of physical function and the design of fall prevention interventions for older adults. Methods: This study is a secondary data analysis utilising the raw data from the National Fitness 100 survey. It involved 1,803 older adults aged 65 and over, with grip strength as the independent variable, flexibility and figure-of-eight walking time (seconds) as dependent variables, and age, BMI and body fat percentage as control variables. Descriptive statistics, Pearson correlation analysis and multiple regression analysis were conducted. Results: Grip strength showed a significant negative correlation with flexibility(r = -0.15) and figure-of-eight walking time(r = -0.52)(p < 0.001), and in the multiple regression analysis, it also exerted a significant negative influence on both flexibility(β = -0.20) and figure-of-eight walking time(β = -0.27)(p < 0.001). Age, BMI and body fat percentage were also significantly associated with increased time taken to complete the figure-of-eight walk. Conclusion: Grip strength in older adults is closely related to dynamic balance and gait performance and can be utilised as a simple screening tool for functional decline; further research is required, including gender stratification, actual fall history, relative grip strength and outlier checks.