Different Location of Triaxial Accelerometer and Different Energy Expenditures.
10.3349/ymj.2014.55.4.1145
- Author:
Do Yoon KIM
1
;
Yoo Suk JUNG
;
Rae Woong PARK
;
Nam Seok JOO
Author Information
1. Fit. Life Inc., Suwon, Korea.
- Publication Type:Original Article ; Clinical Trial ; Research Support, Non-U.S. Gov't
- Keywords:
Physical activity;
energy expenditure;
Signal Vector Magnitude;
triaxial accelerometer
- MeSH:
Adult;
Anthropometry/*methods;
Basal Metabolism/physiology;
Energy Metabolism/*physiology;
Exercise/*physiology;
Female;
Humans;
Male;
Middle Aged;
Oxygen Consumption/physiology;
Young Adult
- From:Yonsei Medical Journal
2014;55(4):1145-1151
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: We performed a study to determine the best appropriate wearing site of a triaxial accelerometer at different exercise speeds. MATERIALS AND METHODS: We conducted an observational study with 66 healthy Korean adults (26 men and 40 women). Resting metabolic rate (RMR) before exercise, physical activity-related energy expenditure (PAEE) by cardiorespiratory gas analyzer and Signal Vector Magnitude (SVM) were measured while wearing four triaxial accelerometers on four different sites (wrist, waist, upper arm, and ankle) at exercise speeds from 2-10 km/h. RESULTS: The mean RMR was 4.03 mL/kg/min and Actual METs (oxygen consumption at different exercise speeds divided by individual RMR) compared with the calculated METs (oxygen consumption divided by 3.5 mL/kg/min) showed relatively low value. The overall correlation between PAEE and SVM was highest when the accelerometer was worn on the wrist at low exercise speed (r=0.751, p<0.001), waist at a moderate speed (r=0.821, p<0.001), and ankle at a high speed (r=0.559, p<0.001). Using regression analysis, it was shown that the ankle at a low speed (R2=0.564, p<0.001), high speed (R2=0.559, p<0.001), and the waist at a moderate speed (R2=0.821, p<0.001) were the best appropriate sites. CONCLUSION: When measuring the PAEE and SVM at different exercise speeds, the ankle in low and high exercise speed, and waist in moderate speed are the most appropriate sites for an accelerometer.
