목적: 본 연구는 삶의 질의 하위개념인 신체활동과 전반적 삶의 질 관계에서 다중 매개효과를 검증하고 참여자의 연령이 신체적 삶의 질과 일상생활활동능력의 다중 매개효과를 조절하는지를 검증하는데 목적이 있다. 방법: 이를 위하여 미국 동남부 두 개의 주에 거주하는 미주 성인 한인 201명을 대상으로 설문지를 통해 자료를 수집한 뒤 조절된 다중 매개 효과를 분석하였다. 결과: 신체활동은 신체적 삶의 질, 일상생활활동능력에 정적인 영향을 보였으며, 신체적 삶의 질, 일상생활활동능력은 전반전 삶의 질에 정적인 영향을 미쳤다. 신체활동은 신체적 삶의 질과 일상생활활동능력을 통제했을 때 전반적 삶의 질에 부정적 영향을 미쳤다. 또한, 높은 신체활동 수준은 신체적 삶의 질과 일상생활활동능력을 통해서 전반적 삶의 질에 긍정적으로 영향을 미치지만, 연령이 높을수록 신체활동의 영향력이 감소하는 것으로 나타났다. 결론: 따라서 미주 한인들의 신체활동이 신체적 삶의 질과 일상생활활동능력을 통해서 전반적 삶의 질에 미치는 영향력은 연령에 의해 조절되는 것을 확인하였다. 이는 신체활동을 통한 개인의 긍정적 라이프스타일을 함양하기 위해서는 단순 개인의 특성만을 강조하는 것보다 문화환경적 요소를 고려해야 필요성을 보여준다.

Purpose: We examined the mediating role of physical self-worth in the relationship between physical activity and quality of life in Korean adolescents. Methods: Data from 236 middle school students were used for the present study (boys = 139, 58.9%; girls = 97, 41.1%; middle school first grade = 127, 53.8%; middle school third grade = 109, 46.2%). Questionnaire data on demographics, physical activity, physical self-worth, subdimnesions of quality of life, and global quality of life were collected. We utilized the Hayes’ (2013) PROCESS Macro to test mediation models. Results: Results revealed that physical activity was associated with physical self-worth, which in turn, was associated with subdimensions of quality of life (e.g., physical, psychological, and emotion and moods quality of life) and global quality of life. Conclusion: More physical activity led to higher perceptions of physical self-worth, thereby contributing to higher perceptions of quality of life. Implications and directions for future research were discussed.

Purpose: A Quality of Life Survey has been developed and used in physical activity and health promotion research, based on a working definition of Quality of Life as: a subjective, multidimensional, integrative construct that reflects optimal well-being and positive health(Gill, et al., 2011). In this study, we developed a Korean version of the Quality of Life(QoL) Survey and assessed its validity. Methods: We developed the Korean version using established cross-cultural translation and validation techniques, with related QoL and physical activity measures used for validity. The first steps were developing an initial Korean version of the QoL measure through a series of translations and back-translations, and giving both the English and Korean versions to university students and community members who speak both Korean and English(N= 39). Next, to establish reliability and validity, we recruited Korean university students participants(N=351) for confirmatory factor analysis, reliability and item analysis with the overall measure and each sub-domain scale, as well as concurrent/construct validity analysis through relationships with conceptually-related measures(WHOQOL-BREF), Satisfaction with Life Scale, and physical activity to explore construct validity. Results: Correlations between Korean and English(N=39) were .382~.919, Cronbach's α of Korean version is .95, English version is .93. Confirmatory factor analysis(N=351) with 7 sub-factors showed good model fit(RMSEA .06, CFI .91, TLI .90). Cronbach’s α for sub-scales ranged from .65~.92, correlations with WHOQOL-BRIEF from .30~.60(p<.01), correlations with SWLS from .33~.48(p<.01). Conclusion: Results support the validity and reliability of Korean version of QoL survey.