| Summary: | Purpose: The purpose of this study was to propose and test a conceptual model that explains the interrelationships among perceived social support, loneliness, physical activity (PA), and quality of life (QoL) among active older adults in South Korea. Methods: Data were collected from 332 individuals over the age of 65 using a systematic stratified convenience sampling method. Survey data were collected and analyzed using a structural equation model (SEM). Results: Perceived social support had a significantly positive effect on PA (β = 0.14, p < 0.01) and QoL (β = 0.28, p < 0.001) while decreasing loneliness (β = −0.55, p < 0.001). PA had a significant positive effect on QoL (β = 0.12, p < 0.01), and loneliness had a negative effect on QoL (β = −0.37, p < 0.001). Loneliness mediated the relationship between perceived social support and QoL. Conclusion: The SEM results of the current study support the proposed model that explained the interrelationships among perceived social support, loneliness, PA, and QoL among active older adults in South Korea. These findings suggest the importance of incorporating social support mechanisms for PA interventions in order to enhance QoL. The findings of this study can help create more effective health and physical education programs for the older generations in South Korea to enhance their QoL. Keywords: Loneliness, Perceived social support, Physical activity, Quality of life, South Korean older adults, Structural equation modeling
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