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Edexcel GCSE PE Unit 17 & 18

Daniel Yates

on 14 January 2014

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Transcript of GCSE PE Diet

What do you think of when you hear the word diet?
Unit 17: The Link between Exercise, Diet, Work and Rest
It is all about achieving balance!
Weight Loss
Slim Fast
Lighter Lite
The biggest loser
supersize v superskinny
Cutting down
Portion control
No Alcohol
It is not all about losing weight though! The word diet can be misused though. It is not just what people on ‘The Biggest Loser’ do. We all have a diet.

The definition of the word diet is....

“The amount of food we can eat on a daily basis” or “the normal food we eat”
So what do I need to know about diet to answer questions in my GCSE PE exam?
•Understand the links between exercise, diet, work and rest and how these factors influence your personal health and wellbeing.

•Explain the requirements of a balanced diet.

•Recall the factors of a balanced diet.

•Explain how each of those factors fits into a balanced healthy lifestyle.
Unit 18: Dietary Intake and Performance
How does work make you happy?

Well it provides you with money.

It can also be very fulfilling and offer mental challenges.

In some cases it can offer physical and social benefits as well. Can you think of any?
All work and no play makes Jack a dull boy!

Rest is essential to wellbeing as it provides time for recovery.
Why is diet important for wellbeing?

Why is it essential for athletic performance?
Macro Nutrients
7 Nutrients
How important is diet?
Well the government think it is worth a national advertisement campaign to get you lot to eat healthier!
An essential part of the recovery process. Protein is used to repair muscles and aid muscle growth.
Carbs are the main source of energy used during exercise. They are transformed into glycogen and stored in the muscles and liver before being used to fuel exercise.
Fats, like carbs are used to provide fuel for athletes during exercise. However they are only used once the body has used its resources of carbs. Therefore fats are only used during long distance events. Many people confuse fats with being fat. In actual fact fats can be both good and bad for you.
It is as easy as ABC.......DE!
Complete the table in your groups of 4 to identify which foods will provide the body with which vitamin. When you have completed the table you will also be able to describe the function of each vitamin in the body!
Explain the process of blood shunting? (4)

Why is it important to time your meals to ensure that blood shunting does not have an adverse effect on performance? (2)

Name 3 events that may require the athlete to carbo load before the event. (3)
Exam Questions
Where will blood be sent to at the start of exercise?

Blood is sent to the working muscle.

Why is this? (think about your knowledge of the cardiovascular system)

Unfortunately because blood is moved to your working muscles by the process of blood shunting there is less available for your gut and stomach to use to digest food. This can lead to stomach cramps or abdominal pain.
Blood flow during exercise

This is the process by which athletes competing in endurance activities increase their intake of carbohydrates in an attempt to maximize their energy stores prior to an event.

Can you think of 4 examples of foods that are high in carbohydrate an athlete could consume prior to a race?

Now with the person next to you try to explain how an individual running the London Marathon might prepare in the week leading up to the marathon following a 20 mile run the previous weekend.
Remember to consider what the athlete will need to eat for recovery and energy.
Carbo Loading
What is Carbo Loading?
Energy Balance
Energy Intake
Energy Expenditure
This is the amount of energy we use through exercise and general life.
What happens if we do not achieve a balance?
Basically if your energy intake is more than your energy expenditure you will put on weight (fat!).
For example: If your energy expenditure is 1000kcal per day but you consume 1500kcal then you will put on weight.

Even if your diet is balanced you will put on weight if your energy balance is not correct as even carbohydrates and protein turn to fat if they are not used.
This is basically the amount of food we consume. As we know carbohydrates and fats are the primary sources of energy
can you link these words to their definitions?
Lets see if you got it right?
Having weight in excess of normal
Having too much body composition as fat
Extreme Overfat
Blood Pressure and Cholesterol
What do we already know?
Learning Objectives
By the end of this unit you should be able to:

Explain the importance of the right timing of dietary intake or optimum performance
Understand and explain blood flow (blood shunting) during exercise
Have a basic understanding of teh terms overweight, overfat and obese.
Understand the importance of achieving a energy balance
Have an increased knowledge of cholesterol and blood pressure.
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