Resistance Exercise Participation in Community-Dwelling Older Adults in Korea: Associated Factors and Sex Differences

Background/Objectives: Despite the importance of resistance exercise in older adults, factors associated with participation remain unclear, especially regarding sex differences. This study investigated sociodemographic, behavioral, and comorbidity factors associated with insufficient resistance exercise participation among community-dwelling older adults in Korea, with analyses stratified by sex. Methods: Nationally representative cross-sectional data from 8671 participants aged ≥65 years (3758 men and 4913 women; mean age 72.8) were analyzed using the 6th-8th Korea National Health and Nutrition Examination Surveys (2014-2019). Complex-sample multivariable logistic regression identified factors associated with insufficient resistance exercise overall and by sex. Results: Women had a higher prevalence of insufficient resistance exercise than men (91.27% vs. 71.04%, p < 0.001). Older age groups, particularly those aged ≥80 years (OR: 2.39; 95% CI: 1.86-3.07), and those with lower education (OR: 1.56; 95% CI: 1.33-1.82), rural residence (OR: 1.89; 95% CI: 1.49-2.38), low household income, (OR: 1.45; 95% CI: 1.13-1.88), insufficient aerobic exercise (OR: 1.68; 95% CI: 1.46-1.94), current smoking (OR: 1.70; 95% CI: 1.26-2.29), and diabetes (OR: 1.28; 95% CI: 1.09-1.51) were independently associated with a higher likelihood of insufficient resistance exercise. The association of household income, current smoking, hypertension, and diabetes with resistance exercise adherence showed differences in sex-stratified analyses. Conclusions: Multiple sociodemographic, behavioral, and comorbid factors are linked to resistance exercise adherence among older Koreans. Tailored, sex-specific interventions are needed to promote resistance exercise in this population, informing public health strategies and further research on effective approaches for diverse older adults.