This document provides information and questions about calculating calorie and kilojoule amounts in foods and estimating the amount of exercise needed to burn off those calories/kilojoules. It includes sample word problems about two teachers eating breakfast and their different exercise routines, estimating how long it would take Lebron James to burn off the calories from a Big Mac meal by playing basketball, comparing calorie burn rates of different activities, and designing a poster advertising nutritional information in terms of exercise.

1. http://www.mathalicious.com/lessons/newtritional-info accessed 7/11/17
Project
1. Intro: Have a look at the packages around. Record the following details
Item Serving Size KJ per serve KJ per 100g Prediction: Amount of
minutes jogging to burn
off 1 serve?
a) Predict:
How long do you think LeBron would have to play basketball to burn off all the calories in a Big Mac Extra
Value Meal?
b) What factors effect how long it takes someone to burn off KJ consumed?
c) Do you think everyone burns KJ at the same rate when they exercise? why or why not?
d) Mrs Lynch and Mrs Phillips go out for breakfast.
Mrs Phillips then runs cross country 52km!! Mrs Lynch swims 2km.
Both eat 870KJ worth of muesli and milk.
Mrs Phillips
5hr
Mrs Lynch
40 min
Burnt off
breakfast?
Yes/no
How many tim-tams can she
snack on after?
1 biscuit= 397KJ
Running
40KJ/min
Swimming
41KJ/min
e) What other factors have been missed out in the calculations above?
f) Did Mrs Phillips eat enough breakfast to run marathon?
g) Considering the information above
What recommendations could you make to both teachers?
h) Design an eating plan for Mrs Phillips before, during and after her run so that she breaks even in KJ usage and
consumption.

2. http://www.mathalicious.com/lessons/newtritional-info accessed 7/11/17
2. Convert the following into KJ
i) Why does Selena burn so few KJ?
j) Why does playing soccer burn more KJ than walking?
k) How much longer would someone have to walk to burn off the same number of KJ as 1 minute of soccer?
l) What factors would effect your answer to C)?
3. If someone wanted to double the amount of KJ burned during exercising what could they do?
Watch clip: http://www.mathalicious.com/lessons/newtritional-info/teach
=kg =kg=kg=kg

3. http://www.mathalicious.com/lessons/newtritional-info accessed 7/11/17
4. A) If an NBA game is 48 minutes long and LeBron ate a big mac extra value meal (1360
cal) before the game, would he burn off all the calories? If not how much longer would
he need to play? (hint convert to KJ first)
1360cal= Kj
b) Should half time be included? Why/why not?
C) Will Lebron’s team mates all burn the same number of KJ? Why/why not?
D) Could Lebron burn more than the average KJ/Kg? Why/why not?
5. Different sports burn different amounts of energy. Use the picture convert the following
into Kj/kg.

4. http://www.mathalicious.com/lessons/newtritional-info accessed 7/11/17
6. Consider the predictions you made at the beginning. How accurate were you?
Item KJ per serve Prediction: Amount of
minutes jogging to burn
off 1 serve?
Actual Answer % error
(Error/actual)x100
7. Fill in the table below choosing three sports for Lebron. Hint: covert to KJ first.
8. A) Do you think publisheing KJ effects what people order? Why/why not
b) Do you think it would be different if macdonalds advertised in terms of
exercise?
9. Prepare a poster for a fast food chain of your choice advertising the nutritional
information in terms of exercise. You may choose one or a variety of sports for your
poster.
Extra thinking: What information would you need to calculate the amount of bread
needed to take the Fellowship to Mordor? Extra Reading: https://futurism.com/scientists-calculated-how-much-
lembas-bread-would-be-needed-to-walk-to-mordor/