2.4 - Healthy food

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

2.4 - Healthy food

Start task 'digestive organs'

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learning objectives

•  You can use the Wheel of Five to give advice about a healthy diet.
  
• You know what a healthy weight is and what choices can help maintain it.
  
• You can name the possible causes and consequences of eating disorders and give a few examples.

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1. Start task                5

2. Theory + notes    15

4. Video                        5

3. Assignments        15

4. End                             1

learning objectives

•  You can use the Wheel of Five to give advice about a healthy diet.
  
• You know what a healthy weight is and what choices can help maintain it.
  
• You can name the possible causes and consequences of eating disorders and give a few examples.

Today's lesson

• The wheel of five
• Energy
• Weight and BMI
• Eating disorders

What is, according to you, 'a healthy and balanced diet'?

I generally have a healthy and balanced diet

yes, I have a healthy diet every day

yes, I have a healthy diet at least 5 days a week

I have a healthy diet between 3-4 days a week

no, I only have a healthy diet less than 3 days a week

no, I have a healthy diet once a week or less

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HEALTHY FOOD

• Provides all the nutrients you need (carbohydrates, fats, protein, water, minerals & vitamins)
  
• Does not contain more energy than you need. 
• Does not contain a lot of sugar, fat & salt. 

HEALTHY FOOD

• The key to healthy eating is variation!

• The wheel of 5 (voedingscentrum) is an aid to help you make healthy food choices.

Wheel of five

Energy

• Energy (calories and joules): Your body gets energy from food, measured in kilocalories (kcal) or kilojoules (kJ);

• 1 kcal = 4.2 kJ

Amount of energy 

• How much energy a person needs, depends on their sex (boy/ girl), body size, physical activity and age.

• examples:

1. sleeping = 4.2kJ per min
2. walking = 16.7 kJ per min
3. jogging = 29.3kJ per min
4. climbing stairs = 46.1 kJ/m

BODY MASS INDEX 

BMI: Calculating your BMI can help you see if you have a healthy weight.

BODY MASS INDEX 

BMI is a simple way to calculate whether your weight is in proportion to your height, but it doesn’t always give a complete picture of your health. For example, it doesn’t take into account your muscle mass, bone structure, or where your body stores fat. Therefore, while it can be useful to consider BMI, it doesn’t tell you everything about how healthy you really are.

Are you in balance?

1. Overweight?
2. Underweight?

overweight / underweight

Weight management: Eat healthily and exercise to control your weight; avoid unhealthy diets.

Eating disorders

Eating disorders: Anorexia and bulimia cause weight problems due to disordered eating and are often linked to a negative self-image.

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