2. Healthy Living: problems for the classroom BMI calculator (using formulae) Eat well, move more, live longer (real life calculations)

3. BMI Calculator

4. Using the BMI calculator

5. Eat well, move more, live longer The NHS has a campaign called change4life to encourage people to adopt healthier lifestyles… … but how much more should a person move to balance excess calorie intake? A 100g bar of chocolate is approximately 500 kcals and a 35g bag of crisps is approximately 200 kcals. How much exercise might a person need to do to balance each of these?

6. The table on the next slide gives the amount of calories burned for various forms of exercise. Calories burned when exercising are also dependent on body mass; figures given are for a 70kg person, exercising for an hour. If a person ‘over-ate’ 1400 calories a week (equivalent to 2 chocolate bars and 2 bags of crisps) what exercise might they do during the week to burn off exactly the 1400 calories? Devise a varied exercise plan for the week. You might like to think about putting together an inexpensive plan that anyone could follow. Eat well, move more, live longer

7. ExerciseCaloriesExerciseCalories Aerobics457Hockey (field)563 Badminton317Horse riding281 Basketball422Housework246 Bowling210Martial arts704 Cycling (slow)281Mowing a lawn387 Cycling (fast)704Roller blading844 Fishing176Running (5mph)563 Football493Skateboarding352 Golf317Swimming493 Gymnastics281Walking (brisk)267

8. Teacher Notes BMI calculator It is important to stress that BMI is just one indicator for assessing health and fitness – and that the 19 to 25 range does not apply to children Answers: 1.84 m and mass 86kg: 25.4 165cm and mass 62kg: 22.8 192cm and mass 68kg: 18.4 Range of masses for a woman of height 165cm: 51.7kg to 68.1kg Mass of 80kg, what height might he be: 1.78m to 2.05m BMI if they are 5 foot 7 height and weigh 10 stone 3 pounds: equivalent to 1.70m and 65 kg so BMI is 22.5

9. Teacher Notes Eat well, move more, live longer It should be stressed that we all need a certain amount of calories, but that healthy living is about balancing what a person eats with how much exercise they do. This activity is designed for students to devise their own exercise plan, so there are no definitive answers, but the extra table given in these notes can be used as a quick reference guide. On slide 5, students might make guesses about how much exercise is required to burn off a chocolate bar or bag of crisps, this can then be ‘checked’ with the information on later slides. To find exercises to burn of exactly 1400 calories, students will need to calculate to the nearest minute. You might like to add restrictions such as ‘There must be 4 different activities and the total exercise time should be between 3 and 4 hours”

10. The table below shows how many minutes it takes to burn 100 calories for each of the forms of exercise. Teacher Notes ExerciseTimeExerciseTime Aerobics13Hockey (field)11 Badminton19Horse riding21 Basketball14Housework24 Bowling29Martial arts8.5 Cycling (slow)21Mowing a lawn15.5 Cycling (fast)8.5Roller blading7 Fishing34Running (5mph)11 Football12Skateboarding17 Golf19Swimming12 Gymnastics21Walking (brisk)22

11. Sources BMI calculator Reference graphs for children’s BMI Calories in various foods List of calories burned by exercise