Factors Affecting Energy Requirements

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What is the first factor affecting energy requirements?
Age
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How much energy do babies need and why?
They have a high energy requirement in proportion to their weight, as they are both physically and mentally growing
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How much energy do children need and why?
They have a high energy requirement as they are very active
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How much energy do teenagers need and why?
They go through puberty - body changes physically as well as growth spurts
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How much energy do adults need and why?
They need less calories for energy as they become more sedentary
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How much energy do the elderly need and why?
They need less energy as they become more sedentary, have a less active lifestyle and their body also slows down
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What is the second factor affecting energy requirements?
Gender
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Which gender typically need more energy?
Males
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Why do males typically need more energy?
They generally have a larger frame, and are also bigger and taller than females. Men also typically have a higher muscle mass, so they would need more calories
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Why do women need more fat than men?
For childbearing
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What is the third factor affecting energy requirements?
Activity levels
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Why would a more sedentary person need less calories?
They would have a higher resting energy expenditure, so they would move less and therefore need less energy
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Why would a physically active person need more calories?
They would have a higher energy expenditure of physical activity, they would move around more and therefore need more energy
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What is BMI?
Basal Metabolic Rate (BMI) is the number of calories required to keep you body functioning at rest (60%)
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What is the fourth factor affecting energy requirements?
State of health
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How would pregnancy affect your energy requirements?
You would need 200 more calories a day for the final trimester
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How would lactation affect your energy requirements?
You would need 400 more calories a day more for six months before weaning
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Why does food need to be introduced in the diet of a baby after six months?
There is no iron in milk, and the foetus only stores a six month supply of iron (in the liver)
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How would illness affect your energy requirements?
Your body would spend a lot of energy fighting disease. Your body typically also rises in temperature, you lose weight and you eat less
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What is the final factor affecting energy requirements?
Climate
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How would a warmer climate affect your energy requirements?
In warmer climates, we tend to eat less or consume more raw food (e.g. salad and ice cream). Therefore, we would need more calories as we eat less
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How would a colder climate affect your energy requirements?
In cold climates, there is a need to eat warm food to generate heat energy in your body (e.g. soups and casseroles)
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Card 2

Front

How much energy do babies need and why?

Back

They have a high energy requirement in proportion to their weight, as they are both physically and mentally growing

Card 3

Front

How much energy do children need and why?

Back

Preview of the front of card 3

Card 4

Front

How much energy do teenagers need and why?

Back

Preview of the front of card 4

Card 5

Front

How much energy do adults need and why?

Back

Preview of the front of card 5
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