PHED2007:CALCULATIONSANSWERS
The Cost of “Supersized” Meals
1. Using the Wendy’s online nutrition information sheet, create two meal options and compare the intake.
Small Sized Meal
Cheeseburger Deluxe
Small Fries
Small Cola
Total
g. Fat
20
16
Large Sized Meal
Baconator
Large Fries
Large Cola
Total
g. Fat
60
26
36
86
g. Carbohydrate
28
44
45
117
g. Protein
23
4
g. Carbohydrate
44
71
75
190
g. Protein
62
7
27
69
Small Sized Meal
a. How many kcalories from each of the macronutrients is provided by the small sized meal?
27g * 4 kcal/g
117g * 4 kcal/g
36 g * 9 kcal/g
Total
=
=
=
108
468
324
kcal protein
kcal carbohydrate
kcal fat
=
900
kcal
b. What proportion of the energy small sized meal comes from each of the energy yielding nutrients?
108/900 * 100
468/900 * 100
324/900 * 100
Total
=
12
52
36
=
=
=
100
% kcal from protein
% kcal from carbohydrate
% kcal from fat
%
Large Sized Meal
a. How many kcalories from each of the macronutrients is provided by the large sized meal?
69g *4 kcal/g
190g * 4 kcal/g
86g * 9 kcal/g
=
=
=
Total
=
276
760
774
1810
kcal protein
kcal carbohydrate
kcal fat
kcal
b. What proportion of the large value sized meal comes from each of the energy yielding nutrients?
276/1810 * 100
760/1810 * 100
774/1810 * 100
Total
=
=
=
=
15.25 % kcal from protein
42
% kcal from carbohydrate
42.75 % kcal from fat
100
%
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Macronutrient Distribution Ranges
2. Calculate the proportion of energy provided by a Sarah’s intake. Protein 97.19g; Fat 87.06g; Carbohydrate 312.88g
c. How many kcalories from each of the macronutrients is provided by Sarah’s diet?
97.19g *4 kcal/g
312.88g *4 kcal/g
87.06g * 9 kcal/g
=
=
=
Total
=
389
1252
784
2425
kcal protein
kcal carbohydrate
kcal fat
kcal
d. What proportion of the energy in her diet comes from each of the energy yielding nutrients?
16% Pro, 52% Carb, 32% Fat
NOTE: THE TOTAL SHOULD ADD UP TO 100%; 99%, OR 101% IS ALSO ACCEPTABLE (DUE TO ROUNDING).
Did Sarah’s diet fall into the Acceptable Macronutrient Distribution Range recommended by the Dietary Reference
Intakes? (p 346)
YES
Alcohol counts for overall Kcalorie intake
3. Calculate how many of the 146 kcalories provided by a 12-ounce can of beer come from alcohol, if the beer contains
1 gram of protein and 13 grams carbohydrate. (Note: the remaining kcalories derived from alcohol.)
1 g protein
=
4
13 g carbohydrate =
146 - 56
=
kcal protein
52
kcal carbohydrate
90
kcal alcohol
How many grams of alcohol does this represent?
90kcal/7kcal/g = 12.86
Comment [MS1]: Subtract known kcal from total
kcal to get kcal from unknown source.
g alcohol
Comment [MS2]: Remember that alcohol
provides 7 kcal/g.
Knowledge is Power
4.
Even a little nutrition knowledge can help you identify some bogus claims. Consider an advertisement for a new
“supper supplement” that claims the product provides 15 grams protein and 10 kcalories per dose. Is this possible?
Why or why not?
Estimated Energy Requirement (EER)
5.
John is a 46 year old sedentary male who weighs 87 kg and is 1.75m tall. Approximately how many kcals would
you expect him to expend each day?
EER for males: 662-9.53 * 46 + 1.0 * [ ( 15.91 * 87 ) + (539.6 * 1.75)]
= 662 – 9.53 * 46 + 1.0 * [ 1384.17 + 944.3]
= 662 – 9.53 * 46 + 1.0 * [2328.47]
= 662 – 438.38 + 2328.47
= 2552.09
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Comment [MS3]: MATH TIP:
Perform operations in () first; [] 2nd .
 or / are done before + or -
6.
John (above) has decided he would like to lose weight and has started doing 1 hour of physical activity each day to
bring his physical activity (PA) level up to active. How will this affect his EER?
PA factor increases from 1.0 to 1.25. The revised EER is
= 662- 438.38 + 1.25 * [2328.47]
= 662 – 438.38 + 2910.59
= 3134.21
In total, the change in activity increases his energy requirement by 582.12 kcal/ day (3134.21 – 2552.09)
7.
Sarah is a 24 year old female who weighs 73 kg and is 1.57m tall. She has determined that her PA level is low
active. Calculate her EER.
EER for low active female: 662- 6.91 * 24 + 1.12 * [(9.36 * 73) + ( 726 * 1.57)]
= 354- 6.91 * 24 + 1.12 * [683.28 + 1139.82]
= 354- 6.91 * 24 + 1.12 * [1823.1]
= 354- 6.91 * 24 + 2041.87
= 354 – 165.84 + 2041.87
= 2230.03
8.
Sarah (above) has lost 3kg over the last 3 months by watching her portion sizes. How will this affect her EER? What
are the implications of this change for people trying to lose weight?
Reducing her weight by 3 kg will change the weight component of the equation from 73 kg to 70 kg
The weight component becomes 9.36*70 = 655.2
The revised EER is: 354- 6.91 * 24 + 1.12 * [655.2 + 1139.82]
= 354- 6.91 * 24 + 1.12 * [1795.02]
= 354 – 165.84 + 2010.42
= 2198.58
Overall, Sarah’s 3 kg weight loss reduces her energy requirement by 31 calories / day.
Energy intake Comparison
9.
Mike’s energy intake was 3369 kcal per day on his 3 day average intake. He is a 19 year old business student at
Mount Royal University who is 177cm tall, weighs 81kg and is very active. Compare his EER to his actual intake.
a. Calculated EER:
662 – 9.53 * 19 + 1.48 * [(15.91 * 81) + (539.6 * 1.77) = 662 – 9.53 * 19 + 1.48 [1288.71 + 955.09]
= 662 – 9.53 * 19 + 1.48 * 2243.8 = 662 – 181.07 + 3320.82
=3801.75
b. Is it about the same, higher, or lower? How much? His intake is lower by 3369- 3801.75 = -432.75 kcal
c. Based on this observation, theoretically, should he be gaining, losing or maintaining weight? Losing wt.
d. Explain why (hint: provide numerical support). How much weight change is expected in one week (show
calculations)?
3500 kcal = 1 pound
432.75 * 7 days = 3029.25 kcalorie deficit per week.
3029.25/3500 = 0.87 pounds lost per week.
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Comment [MS4]: Note this is 1.77 m.
e. Discuss whether or not a change in kcal intake is needed and why (base this on your opinion as well as
scientific fact - BMI). BMI = 81kg/(1.77) x (1.77) = 26 kg/m2. No changed need because weight loss at this
rate will put him in the health range. After that he should increase his intake to maintain a healthy weight.
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