Total daily energy expenditure and pattern of physical activity measured by minute-by-minute heart rate monitoring in 14–15 year old Swedish adolescents

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Abstract
Objective: To assess total daily energy expenditure (TDEE) and patterns of physical activity among Swedish male and female adolescents and to relate the amount and intensity of physical activity to existing recommendations (energy expenditure equal to or above 12.4 kJ/kg/day or accumulation of 30 min/day in moderate physical activity equal to 4.5 times sedentary energy expenditure or more). Design: TDEE, physical activity level (PAL=TDEE/BMR), energy expenditure (EE) and time spent in different intensities of physical activity were assessed by using minute-by-minute heart rate monitoring in combination with laboratory measured sedentary energy expenditure (SEE) and peak oxygen uptake. Setting: Department of Physical Education and Health, Örebro University, and Department of Clinical Physiology, Örebro Medical Centre Hospital, Sweden. Subjects: Eighty-two 14–15 y old adolescents (42 boys, 40 girls) from the city of Örebro, randomly selected through a two-stage sampling procedure. Results: TDEE was 12.8 MJ/day and 10.0 MJ/day for boys and girls respectively (Pn=30) with the lowest PAL values (European Journal of Clinical Nutrition (2000) 54, 195–202

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