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CHAPTER 2 NUTRITIONS
2.2 THE IMPORTANCE OF A BALANCED DIET
A BALANCE DIET contains the right ao!nts o" the se#en
c$asses o" "oo% to eet
the %ai$& re'!ireents o" the (o%&
FACTORS DETERMINE A BALANCED DIET
A)E BOD* SI+E SE, OCCUPATION
A%o$escents an%
chi$%ren nee% ore
energ& in their %iet "or gro-th
Largersi/e%in%i#i%!a$s nee% to
s!00$& ore energ& to
ore (o%& ce$$s
Ma$es genera$$&nee% ore energ&
in their %iet than
"ea$es (eca!sea$es ha#e $ess
"att& tiss!es in their
(o%&
A constr!ction -or1er nee%s ore energ& than
an o""ice -or1er
(eca!se he $osesenerg& at a "aster rate
than the o""ice -or1er
PH*SICAL
ACTIITIES
CLIMATE STATE OF
HEALTH
An acti#e ath$ete nee%s
ore energ& an% 0roteins than a
se%entar& o""ice
-or1er
A 0erson $i#ing in a
co$% c$iate nee%sore energ& to 1ee0
his (o%& -ar
co0are% to a 0erson$i#ing in a -ar
c$iate
A 0regnant -oan
nee%s a %iet that 0ro#i%es ore
energ&3 0roteins
an% essentia$inera$s "or her
an% her (a(&
ENERGY VALUE OF FOODThe ao!nt o" energ& re$ease% "ro one gra
o" a 0artic!$ar t&0e o" "oo% is 1no-ns asits ca$ori"ic #a$!e or
energ& #a$!e.
Class of food Energy value (kJ/g
Car(oh&%rates 45
Proteins 46
Fat 78
CALORIFIC ALUE or energ& #a$!e is eas!re% in 9o!$es :;<
or ca$ories :ca$<
4 ca$orie :ca$< = >.2 9o!$es :;<
4 1i$oca$orie :1ca$< = >.2 1i$o9o!$es :1;
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Ta($e 4 contains the ca$ori"ic #a$!es o" soe "oo%
Ta($e 4
Food Calor!f!" value #er $%%g (kJ Tose 4?>
nasi $ea1 >82
orange 9!ice 2@2
eat 27?
i$1 25
g!a#a 28@
4. Use the in"oration in Ta($e 4 to ca$c!$ate the ca$ories "oo%
in Mea$ A an% B
Mea$ A Mea$ B
4@@ g Tose 46@ g eat
4?@ g nasi $ea1 4@@ g i$1 2@@ g orange 9!ice 42@ g
g!a#a
Mea$ A= 4?> 4?@>82 2@@2@2
4@@ 4@@
= 4?> 576 >@>
= 428 1;
Mea$ B
=
=
= ..........1;
2. The ca$ori"ic #a$!e o" 0i//a is 421;g. Ca$c!$ate the
ca$ori"ic #a$!e in 4@@g o" 0i//a.
7. Ta($e 2 sho-s the ca$oric"ic #a$!e o" soe "oo%TABLE 2
Foo% G!antit& Ca$ori"ic #a$!e :1;<
Nasi $ea1 4 0$ate 47@
Ice crea 4 scoo0 86@
Banana 4 0iece 72
Mi$1 4 g$ass 25?
