4 DISCUSSIONS
Schoolchildren at Pacar Kembang IV Surabaya
Primary School have an average age of 10.2 years, in
the range of 9–12 years. Children aged 9–12 years are
in pre-adolescence, with an age division of 9–12 years
for girls and 10–12 years for boys. This age is a
crucial time to maintain a good intake to support
growth and development (Brown et al., 2017).
In this study, it was found that most children had
pocket money greater than Rp. 5,000. The higher the
pocket money of schoolchildren, the higher their
ability to buy food, thus affecting their intake (Desi et
al., 2018). This can be influenced by the occupation
of parents, which is related to the amount of family
income. If the family income is high, then the pocket
money given to children is also high. However, this
does not necessarily fulfill the food intake given to
children according to their needs (Wicaksana &
Nurrizka, 2019). The latest education of parents
indirectly affects the nutritional status of school
children. The higher the education of the parents, the
more favorable the variety and amount of food given
to the family (Jannah & Utami, 2018).
In this study, 60.2% of schoolchildren had
overnutrition or were overweight. Compared to the
obesity rate of 18% reported by the WHO in 2021, the
nutritional status rate in this study was higher at
39.8%. 6 Abnormal nutritional status occurs due to an
imbalance between nutrient intake and the body's
needs (Par’i et al., 2017).
Dietary intake in this study showed that
schoolchildren with overnutrition and undernutrition
had less fat intake and more protein intake. The mean
daily energy intake from food was 1876.77 kcal,
which was less than the Energy Adequacy Rate
required for boys and girls aged 10 to 12 years (2000
kcal and 1900 kcal, respectively) but more than the
Energy Adequacy Rate for children aged 7-9 (1650
kcal). The daily protein requirement of school-age
children was 71.89 grams, higher than the
recommended protein adequacy rate for boys and
girls aged 9 to 12 years (40 grams, 50 grams, and 55
grams). A total of 53.65 grams of fat were consumed
by the children daily, which is less than the Fat
Adequacy Intake of 55 grams and 65 grams for both
boys and girls aged 9 to 12 years. Carbohydrate intake
from the daily diet of schoolchildren is 277.7 grams,
which exceeds the needs of schoolchildren aged 7-9
years (250 grams) but is still less than the needs of the
Carbohydrate Adequacy Rate for children aged 10 to
12 years for both boys and girls, which is 300 grams
and 280 grams.
This study shows that there is no relationship
between energy, fat, and carbohydrate intake and
overnutrition status, and there is a relationship
between protein intake and overnutrition status. This
happened because the SQ-FFQ instrument
questionnaire has limitations so that the results of
energy, protein, fat, and carbohydrate intake from
daily meals depend on memory and do not describe
the actual food consumption of schoolchildren. The
physical activity of schoolchildren in this study
mostly had low sedentary activity, meaning moderate
to high activity levels. There was no relationship
between energy, fat, and carbohydrate intake and
overnutrition because energy derived from food is
used for physical activity. This means that energy is
obtained through food consumption and expended
through physical activity (Sari et al., 2018).
Meanwhile, there is a relationship between
protein intake and overnutrition because protein is
used for growth and development as well as physical
activity. The types of proteins that support children's
activity are actin, myosin, dynein, and tubulin.
Protein plays a role in converting chemical energy
into mechanical energy involved in movement. The
protein acts as a catalyst in the decomposition of ATP
as an energy source for activity (Suhartono, 2017).
Physical activity is all body movement due to muscle
contraction, and one of the functions of protein is to
play a role in muscle contraction. Muscle contraction
occurs due to the interaction between actin and
myosin muscle proteins that require ATP with the
help of enzymes known as ATPase enzymes (Welis
& Rifki, 2013). So, protein intake affects nutritional
status through growth and development.
This study shows there is no significant
relationship between sedentary activity and
overweight status. The results of the study are not
related because schoolchildren who are overweight or
not overweight have moderate to high levels of
physical activity. Schoolchildren go to school and
return home from school on foot, play soccer on the
sports field, and do extracurricular activities such as
dance, poetry, and samroh. When doing activity,
calories are burned, which can affect the basal
metabolic system (Tanjung & Bate’e, 2019).
Therefore, sedentary activity is not associated with
overweight status because schoolchildren still engage
in high- to moderate-level physical activity in their
daily lives. As a result, the basal metabolism of
schoolchildren increased.
This study certainly has both strengths and
weaknesses. Its main strengths lay in its
comprehensive approach, using a large and diverse
sample population, and using standardized