Estimating Activity-related Energy Expenditure Under Sedentary Conditions Using a Tri-axial Seismic Accelerometer

被引:56
作者
van Hees, Vincent T. [1 ,2 ]
van Lummel, Rob C. [2 ]
Westerterp, Klaas R. [1 ]
机构
[1] Maastricht Univ, Dept Human Biol, Maastricht, Netherlands
[2] McRoberts BV, The Hague, Netherlands
关键词
PHYSICAL-ACTIVITY ASSESSMENT; DOUBLY LABELED WATER; INTRAINDIVIDUAL VARIABILITY; ACTIVITY MONITORS; CHILDREN; ADOLESCENTS; CALIBRATION; PREDICTION; CHAMBER; OBESITY;
D O I
10.1038/oby.2009.55
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Activity-related energy expenditure (AEE) is difficult to quantify, especially under sedentary conditions. Here, a model was developed using the detected type of physical activity (PA) and movement intensity (MI), based on a tri-axial seismic accelerometer (DynaPort MiniMod; McRoberts B. V., The Hague, the Netherlands), with energy expenditure for PA as a reference. The relation between AEE (J/min/kg), MI, and the type of PA was determined for standardized PAs as performed in a laboratory including: lying, sitting, standing, and walking. AEE (J/min/kg) was calculated from total energy expenditure (TEE) and sleeping metabolic rate (SMR) as assessed with indirect calorimetry ((TEE x 0.9)-SMR). Subsequently, the model was validated over 23-h intervals in a respiration chamber. Subjects were 15 healthy women (age: 22 +/- 2 years; BMI: 24.0 +/- 4.0 kg/m(2)). Predicted AEE in the chamber was significantly related to measured AEE both within (r(2) = 0.81 +/- 0.06, P < 0.00001) and between (r(2) = 0.70, P < 0.001) subjects. The explained variation in AEE by the model was higher than the explained variation by MI alone. This shows that a tri-axial seismic accelerometer is a valid tool for estimating AEE under sedentary conditions.
引用
收藏
页码:1287 / 1292
页数:6
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