GT1M과 GT3X가속도계의 신체활동량 추정 타당도 평가

The purpose of this study is to evaluate the validation of physical activity between GT1M, the uniaxial accelerometer and GT3X, the triaxial accelerometer. For the subject of the study, 28 children and 17 adults were random sampling who are residing in Gyeonggi province. It is observed that as the exercise intensity increases, the physical activity of VO2, METs, GT1M and GT3X in both groups are increased. Also, when both two groups have given changes to equivalent exercise intensity, the children showed higher VO2 and METs changes than those of adults while the value of GT1M and GT3X showed lower changes. As a result of observing the relationship between accelerometer and standard tool, activity counts of GT1M and GT3X and all variables of K4b2 which were employed in this study showed statistically significant relation, while showed higher relation in adult than in children(p<.01). Both GT1M and GT3X showed higher explanatory power in adult (R2=.798, R2=.801) than in children (R2=.550, R2=.522). In Bland-Altman Plot, GT3X showed confidence interval with less deviation than GT1M, while the adult showed confidence interval with less deviation than the children. To provide a more accurate result value, the correct choice of accelerometer according to the sampling is required.