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Estimation of Energy Expenditure using Unfixed Accelerometer during Exercise  

Kim, Joo-Han (Dept. Biomedical Engineering, Yonsei University)
Lee, Jeon (Department of Oriental Biomedical Engineering, Daegu Hanny University)
Lee, Hee-Young (Dept. Biomedical Engineering, Yonsei University)
Kim, Young-Ho (Dept. Biomedical Engineering, Yonsei University)
Lee, Kyoung-Joung (Dept. Biomedical Engineering, Yonsei University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.48, no.4, 2011 , pp. 63-70 More about this Journal
Abstract
In this paper, we proposed a method for estimating energy expenditure using the unfixed axis of the accelerometer. Most studies adopted waist-placement because of the fact that the waist is close to the center of mass of a whole human body. But we adopted pocket-placement, which is capable of using unfixed axis of sensor, that is more convenient than conventional methods. To evaluate the proposed method, 28 male subjects performed walking and running on a motor driven treadmill. All of subject put on the indirect calorimeter and fixed accelerometer, then data were simultaneously measured during exercise. The regression analysis was performed using the test group(n=20) and the regression equation was applied to the control group(n=8). A strong linear relationship between energy expenditure and unfixed accelerometer signal was found. Futhermore, the coefficient of determination was significantly reliable($R^2$=0.98) and showed zero of p-value. The error of energy expenditure estimation between indirect calorimeter and two types of accelerometer was 15.0%(fixed) and 17.0%(unfixed) respectively. These results show the possibilities that the unfixed accelerometer can be used in estimating the energy expenditure during exercise.
Keywords
accelerometer; unfixed axis; indirect calorimeter; regression analysis; energy expenditure;
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Times Cited By KSCI : 2  (Citation Analysis)
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