The Analysis of Activity Energy, Total Energy, and Estimated Energy Expenditures in 5th and 6th Grade Primary School Students

Article information

Korean J Community Nutr. 2011;16(2):195-205

Publication date (electronic) : 2011 April 30

doi : https://doi.org/10.5720/kjcn.2011.16.2.195

Mi-Jeong Kim , Hyeon-Ju Na ¹, Youngnam Kim ²

Sinmuk Primary School, Kyeunggi Do, Korea.

¹Imae High School, Kyeunggi Do, Korea.

²Department of Home Economics Education, Korea National University of Education, Chungbuk, Korea.

Corresponding author: Youngnam Kim, Department of Home Economics Education, Korea National University of Education, Darak-ri, Gangnae-myeon, Chungwon-gun 363-791, Chungbuk, Korea. Tel: (043) 230-3709, Fax: (043) 231-4087, youngnam@knue.ac.kr

Received 2010 December 20; Revised 2011 January 28; Accepted 2011 March 31.

Abstract

This study was conducted to investigate the time spent, activity coefficient and energy expenditure on 7 different types of activity. Total of 386 5th and 6th grade primary school boys and girls in Seoul participated in this study. The participants spent 8 hrs for rest, 4 hrs for out of school study, 3 hrs for leisure, 1 hr 45 mins. for hygiene, 1 hr for commute, and 15 mins. for house choir activity in the day of 6 class hours. The average activity coefficient of 1 day for boys and girls were 1.69 and 1.64, respectively. The TEEs were 2,382 kcal and 2,050 kcal for boys and girls, respectively. The energy cost for study related activity (in school and study activities) was 40% of the TEE, and for rest 20%, for commute 9%, and for hygiene 10% of the TEE. The energy cost for house choir was only about 2% of TEE. The 91.2% participant's EER was higher than the EER shown in the table of 2010 DRI for Koreans. When the participant's EER was compared with the energy allowance calculated by the method in 2000 RDA for Korean, 81.6% was in the range of ± 5%, and the correlation coefficients between the 2 values were 0.981 for boys and 0.978 for girls, which means high agreements.

Keywords: activity energy; activity coefficient; energy allowance; total energy expenditure; estimated energy requirement

Notes

This work was supported by a grant from Korea National University of Education (2010)

References

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Article information Continued

Fig. 1

Relationship between recommended energy intake (2000) and estimated energy requirement (2010) of the boy and girls.

Table 1

General characteristics of the subjects

1) for boy; 2) for girl

Table 2

Physique of the subjects

1) Mean (SD)

Table 3

Activity time & coefficient, and energy expenditure by gender in 7 different activities

1) ^*: P < 0.05, ^**: P < 0.01, ^***: P < 0.001

2) NA: Non Applicable

Table 4

Results of statistically significant difference evaluation of activity time, activity coefficient, and energy expenditure by the subject's grade, gender and obesity

1) t-value, 2) F-value, 3) ^*: P < 0.05, ^**: P < 0.01, ^***: P < 0.001

4) Scheffe posteriori test: ㉠ underweight, ㉡ normal, ㉢ overweight/obese; ㉮ seldom, ㉯ < 1 hr/day ㉰ 1~2 hr/day, ㉱ 2 ≤ /day exercise

5) NA: Non Applicable

Table 5

Distribution of total energy expenditure (TEE) of the subjects by the calculation formula in DRI for Koreans (first revision, 2010)

1) N (%)

Boy: 1,403 kcal~4,747 kcal; Girl: 1,512 kcal~2,720 kcal

Table 6

Percent difference between the EER in the table of DRI for Koreans (2010) and EER of the subjects

1) N (%)

Reference EER (9 - 11 years): 1,900 kcal/day for boy; 1,700 kcal/day for girl (DRI for Koreans, first revision, 2010)

Table 7

The difference between the recommended energy intakes by the estimation methods in RDA for Koreans (7th revision, 2000) and DRI for Koreans (first revision, 2010)

1) N (%)