Key term
WJEC A-Level Physical Education 601-8485-1
Performance Analysis and Fitness Testing
Levers and Movement Analysis
Joints and the Musculo-Skeletal System
Components of Fitness and Methods of Training
Energy Systems and Principles of Training
Fatigue, Recovery and Rehabilitation
Diet, Nutrition and Hydration
Personality
Stress, Arousal and Anxiety
Motivation and Self-Efficacy
Skill, Ability and Skill Classification
Learning Curves, Theories and Stages
Transfer, Practice, Guidance and Feedback
Sport, Culture and Society
The Emergence of Modern Sport
Social Differentiation in Sport
Short-Term Responses to Exercise
Long-Term Adaptations to Exercise
Carbohydrate Loading and Supplements
Biomechanical Principles
Linear and Angular Motion
Projectile Motion and Fluid Mechanics
Attitudes
Aggression
Social Facilitation
Group Dynamics and Leadership
Attribution Theory
Information Processing and Memory
Ethics, Deviance and Doping
Sport and the Mass Media
Commercialisation and Globalisation
Diet, Nutrition and Hydration
A balanced diet and energy balance
- 3 things to know
- AS Unit 1
Overview
A balanced diet and its proportions, energy balance, positive and negative balance, measuring energy in food with a worked kilojoule conversion, the extra energy performers need, and the risks of a severe deficit.
What you need to know
Answer each one before you reveal it.
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Key term
What are the relative proportions of carbohydrate, fat and protein in a balanced diet?
Key term
What is energy balance?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is a balanced diet?
Model answer
A balanced diet contains the right amounts of each nutrient for health and activity. A balanced diet includes carbohydrate, fat, protein, vitamins, minerals, fibre and water.
- 2
What are the relative proportions of carbohydrate, fat and protein in a balanced diet?
Model answer
About 55% of energy should come from carbohydrate and about 30% from fat. About 15% should come from protein.
- 3
What is energy balance?
Model answer
Energy balance is when energy intake equals energy expenditure. Body mass then stays the same.
- 4
What happens when energy intake exceeds expenditure?
Model answer
The extra energy is stored as fat. Body mass increases.
- 5
What happens when energy expenditure exceeds intake?
Model answer
The body uses stored energy. Body mass decreases.
- 6
How is energy in food measured?
Model answer
Energy is measured in kilojoules or kilocalories. One kilocalorie is about 4.18 kilojoules.
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