중년 남녀의 체지방 측정을 위한 모바일사진체적추정법의 타당도
The Validity of Mobile Digital Image Plethysmography to Estimate Body Fat in the Middle Aged
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초록
이 연구의 목적은 체지방을 추정하는 사진체적추정법(Digital Image Plethysmography)을 모바일 적용의 가능성을탐색하기 위해 타당도 검증을 하는 것이다. 이를 위하여 신체적으로 특별한 질병과 근골격계 질환이 없으며, 규칙적인운동에 참여하지 않는 남자 53명(45.02±4.40세, 171.49±5.54㎝, 73.19±7.52㎏, 25.04±2.70%BF)과 여자 52명(43.89±6.83세, 158.81±4.90㎝, 56.48±7.43㎏, 31.52±4.29%BF)을 임의로 선정하였다. DEXA로 측정한 체지방률을종속변수, MDIP(Mobile Digital Image Plethysmography) 방법을 이용하여 산출한 정면과 측면의 면적을 독립변수로 한 다중회귀분석을 실시하였다. 또한, DEXA 방법과 DIP, MDIP, BIA 방법의 상관관계에서도 MDIP 방법은DIP 방법과 유사한 결과를 보였으며, BIA 방법보다 높은 타당도를 나타내 체지방 추정에 있어 현장 적용의 가능성이충분한 것으로 판단된다. 또한, 회귀식의 교차타당도 검증을 위해 급내상관계수를 산출한 결과, MDIP 방법도 남녀 각각 r=.991 r=.989로 나타나 체지방률의 추정에 타당한 방법인 것을 알 수 있다.
Abstract
This research aims at examining the possibility of the application of Digital Image Plethysmography (DIP) to estimate body fat to mobile phones and verifying its validity. For which, 53 males and 52 females were selected at random who had no particular physical deseases or musculoskeletal disorder and had not participated regular exercises. Then, multiple regression analysis was conducted with the body fat ratio measured through DEXA as the dependent variable, and the area of the front and the side calculated through MDIP as the independent variable. Moreover, in the correlation between DEXA, DIP, MDIP, and BIA, MDIP also displayed the similar outcome as with DIP, and higher level of validity than with BIA, so it's been concluded to have enough potential to be applied to the field in measuring body fat. In addition, when the intraclass correlation coefficient was calculated in order to verify the cross validity of the regression equation, it has been found out that r=.991 for the males and r=989 for the females with MDIP, so it has been concluded to be appropriate for the measurement of body fat ratio.
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