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KMID : 0123420070120030361
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Korean Journal of Community Nutrition
2007 Volume.12 No. 3 p.361 ~ p.371
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Assessment of Daily Steps, Physical Activity and Activity Coefficient of the Elementary School Children in the Rural Area
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Lee Hyun-Mi
Kim Eun-Kyung
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Abstract
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The purpose of this study was to assess the daily steps, physical activities and activity coefficient of the elementary
school children in the rural area. Body weight, height and daily steps were measured and one-day activity diaries were
collected by interviewing children. The average age of the subjects was 9.96± 1.02 years. Average height, weight,
obesity index, body fat and muscle of subjects were 136.2± 8.9 cm, 35.2± 8.5 kg, 99.6± 18.8%, 22.9± 8.5% and
35.8± 6.0%, respectively. The average daily steps of the subjects was 17,584 and daily steps (19,314) of 3rd grade
students was significantly higher than that (15,712) of 5th grade children. But there was no significant difference in
daily steps and activity coefficients between boys and girls. Daily steps (23,347) of exercise group showed the
significantly higher than that (16,144) of non-exercise group. Gender and grade of subjects did not have significant
influence on activity coefficients, but there was a significant difference in activity coefficient on weekdays between
the exercise group (1.82± 0.30) and non-exercise group (1.50± 0.21). Analysis of variance revealed stronger
associations between daily steps and body fat (%) than between daily steps and BMI. Daily steps showed significant
negative correlation with body fat (%) measured using two methods r = ?0.321 and r = ?0.365, respectively. Activity
coefficient was significantly correlated (r = 0.436) with daily steps, thus increasing daily steps can prevent and treat
childhood obesity by increasing the energy expenditure. The higher activity coefficients (weekday 1.56, weekend 1.53)
of the subjects was caused by the fact that rural students spent more time outside and enjoyed stronger activities than
urban students. The results of this study can be used to estimate energy requirements for Korean children based on
exercise levels and living areas. (Korean J Community Nutrition 12(3) : 361~371, 2007)
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KEYWORD
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pedometer count, activity coefficient, elementary school children
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