期刊
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
卷 89, 期 6, 页码 624-626出版社
SPRINGER
DOI: 10.1007/s00421-003-0891-6
关键词
total daily energy expenditure; accelerometer; Tracmor; physical activity level; doubly labeled water
The present study investigated the use of a triaxial accelerometer, Tracmor2, for the measurement of physical activity in children. Eleven children [age 6.9 (2.2) years, body mass 19.5 (5.3) kg and height 112.3 (14.4) cm] were studied. Total daily energy expenditure (TDEE) was measured using the doubly labeled water method over a 2-week period. In addition, basal metabolic rate (BMR) was determined by the ventilated hood system. Physical activity level (PAL) was defined as TDEE/BMR. Tracmor2 was worn during the same 2-week period throughout waking hours after which average counts per day were calculated. The average counts per day were shown to be highly correlated to PAL values measured by doubly labeled water: PAL = 1.156x10(-5)xTracmor(2) average counts day(-1) + 0.978 (r=0.79, P<0.01). In conclusion, Tracmor2 is a valid instrument to measure physical activity in children under free-living conditions.
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