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
Short-Term Responses to Exercise
Neuromuscular responses, steady state and VO₂max
- 3 things to know
- A2 Unit 3
Overview
The warm muscle and nerve impulses, motor unit recruitment in prolonged and repeated efforts, steady state, VO₂max and the progressive test, and interpreting heart rate, ventilation and oxygen uptake data.
What you need to know
Answer each one before you reveal it.
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Key term
How are motor units recruited as exercise intensity rises?
Key term
How does the neuromuscular system respond during prolonged exercise?
Questions from this subtopic
Each one with the model answer underneath.
- 1
How does warming up change the neuromuscular system?
Model answer
Warm muscle conducts nerve impulses faster. Faster transmission quickens reaction time and makes muscle contractions stronger and quicker.
- 2
How are motor units recruited as exercise intensity rises?
Model answer
Small motor units with slow oxidative fibres are recruited first at low intensity. Larger motor units with fast fibres are added as more force is needed.
- 3
How does the neuromuscular system respond during prolonged exercise?
Model answer
Motor units are recruited in rotation, so some fibres rest while others contract. Recruitment of fast fibres rises late in a long event as slow fibres tire.
- 4
How does the neuromuscular system respond to repeated maximal efforts?
Model answer
Repeated maximal efforts deplete phosphocreatine in fast glycolytic fibres. Force output falls as fewer fast motor units can fire at full power.
- 5
What is steady state?
Model answer
Steady state is when oxygen supply meets the oxygen demand of exercise. Heart rate, ventilation and oxygen uptake level off at a plateau.
- 6
Why can steady state not be reached in maximal exercise?
Model answer
Oxygen demand in maximal exercise exceeds what the body can supply. The anaerobic systems make up the shortfall, and lactic acid accumulates.
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