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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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PHYSICAL ACTIVITY PATTERNS AND ESTIMATED DAILY ENERGY EXPENDITURES IN NORMAL AND OVERWEIGHT TUNISIAN SCHOOLCHILDREN |
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Fayçal Zarrouk1  , Ezdine Bouhlel2, Youssef Feki3, Mohamed Amri4 and Roy J.
Shephard5 |
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1Institut Supérieur du Sport et de l'Education Physique du Kef, Tunisie, 2Institut Supérieur du Sport et de l'Education Physique de Gafsa, et Laboratoire de Physiologie, Faculté de Médecine Ibn El jazzar, Sousse, Tunisie, 3Institut Supérieur du Sport et de l'Education Physique du Kef, Tunisie, 4Laboratoire de Physiologie de la Nutrition, Faculté des Sciences de Tunis, Tunisie, Médecine Ibn El Jazzar, Sousse, Tunisie, 5Faculty of Physical Education & Health, University of Toronto, Toronto, ON., Canada. |
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© Journal of Sports Science and Medicine (2009) 8, 83 - 88 Search Google Scholar for Citing Articles |
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| ABSTRACT | |||
| Our aim was to test the normality of physical activity patterns
and energy expenditures in normal weight and overweight primary school students.
Heart rate estimates of total daily energy expenditure (TEE), active energy
expenditure (AEE), and activity patterns were made over 3 consecutive school
days in healthy middle-class Tunisian children (46 boys, 44 girls, median
age (25th-75th) percentile, 9.2 (8.8-9.9) years. Our cross-section included
52 students with a normal body mass index (BMI) and 38 who exceeded age-specific
BMI limits. TEE, AEE and overall physical activity level (PAL) were not
different between overweight children and those with a normal BMI [median
values (25th-75th) 9.20 (8.20-9.84) vs. 8.88 (7.42-9.76) MJ/d; 3.56 (2.59-4.22)
vs. 3.85 (2.77-4.78) MJ/d and 1.74 (1.54-2.04) vs. 1.89 (1.66-2.15) respectively].
Physical activity intensities (PAI) were expressed as percentages of the
individual's heart rate reserve (%HRR). The median PAI for the entire day
(PAI24) and for the waking part of day (PAIw) were lower in overweight than
in normal weight individuals [16.3 (14.2-18.9) vs. 20.6 (17.9-22.3) %HRR,
p < 0.001) and 24.8 (21.6-28.9) vs.26.2 (24.5-30.8) %HRR, p < 0.01],
respectively. Overweight children allocated more of their day to sedentary
pursuits [385 (336-468) vs 297 (235-468) min/d, p < 0.001], and less
time to moderate physical activity [381(321-457) vs. 460 (380-534) min/d,
p < 0.01]. Nevertheless, because of the greater energy cost of a given
task, total and active daily energy expenditure did not differ from those
with a normal BMI.
Key words: Heart rate monitoring, activity patterns, energy expenditure, excess weight, obesity. |
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