연령대에 따른 한국 고령자의 신체활동 주당 시간이 노쇠지수의 변화에 미치는 영향

Abstract

“Exercise is good medicine” is well known, but the optimal weekly time dose of physical activity across age ranges of older adults is still unknown. In this study, 2,224 respondents who satisfied the criteria from the KLoSa Wave 8 survey were selected for observation. Based on the World Health Organization's recommended weekly physical activity time criteria, the respondents were divided into three groups: a group of less than 150 minutes, a group of 150-300 minutes, and a group of more than 300 minutes. Frailty index scores were also created using 65 variables related to health. We compared the odds ratios between the dose of physical activity time and the incidence of frailty in Korean older adults of different age ranges. The results showed that at 60-69 years range, the optimal duration of physical activity is the group of less than 150 minutes(OR: 0.9873; 95% CI: 0.9768 to 0.9978); at 70-79 years range, the optimal duration of physical activity is the group of 150 to 300 minutes(OR: 0.9960; 95% CI: 0.9921 to 0.9999); at 80 age and older range, the optimal duration of physical activity is the group of more than 300 minutes(OR: 0.9960; 95% CI: 0.9930 to 0.9991). We observed that (1)the duration of physical activity required to reduce frailty risk increased with age, (2)the proportion of decrease in the risk of frailty decreased with age. (3)And, we determined the optimal duration of physical activity required for age ranges.