Describe the contraction speed and force of slow twitch fibres.

Slow twitch fibres contract slowly and produce low force. Slow twitch fibres can keep contracting for long periods.

Why do slow twitch fibres appear red?

Slow twitch fibres contain a lot of myoglobin and are supplied by many capillaries. The myoglobin and blood give the fibres a red colour.

What are the main characteristics of fast glycolytic (type IIx) fibres?

Fast glycolytic fibres contract very quickly and produce the greatest force. Fast glycolytic fibres fatigue rapidly because they rely on anaerobic ATP production.

Why do fast glycolytic fibres have high stores of phosphocreatine and glycogen?

Fast glycolytic fibres produce ATP anaerobically. Large stores of phosphocreatine and glycogen fuel the ATP-PC and anaerobic glycolytic systems.

AQA A-Level Physical Education 7582

The Cardiovascular System

Topic overview Heart health, fitness and cardiac output The cardiac conduction system and heart rate control Receptors, vascular shunting and blood redistribution Oxygen transport, the Bohr shift and the a-VO₂ difference Venous return, Starling's law and cardiovascular drift

The Respiratory System

Topic overview Lung volumes and minute ventilation Gas exchange, diffusion and partial pressure Control of breathing during exercise Smoking and the respiratory system

The Neuromuscular System

Topic overview Muscle fibre types and their characteristics The nervous system and motor units Summation, the all-or-none law and tetanic contraction Muscle spindles, Golgi tendon organs and PNF

The Musculo-Skeletal System and Movement Analysis

Topic overview Planes, axes and sagittal plane joint actions Frontal and transverse plane joint actions Joint types, articulating bones and muscle pairs Isotonic and isometric contraction in sporting actions

Energy Systems

Topic overview ATP and the aerobic energy system Anaerobic energy systems and the energy continuum Lactate accumulation, the lactate threshold and OBLA Oxygen deficit and EPOC VO₂ max, RER and measuring energy expenditure Altitude training, HIIT, plyometrics and SAQ

Skill, Transfer and Practice

Topic overview Characteristics of skill Classifying skills on the six continua Transfer of learning Whole, progressive part and whole–part–whole practice Massed, distributed, variable and mental practice

Theories of Learning

Topic overview Fitts and Posner's stages of learning Learning plateaus and performance curves Insight learning and operant conditioning Observational learning and social development theory

Guidance and Feedback

Topic overview Verbal and visual guidance Manual and mechanical guidance Types of feedback Matching feedback and guidance to the learner

Information Processing and Memory

Topic overview Input, receptors and the DCR process Memory and the working memory model Whiting's information processing model Reaction time, response time and Hick's law The psychological refractory period and anticipation Schmidt's schema theory

The Emergence and Globalisation of Sport

Topic overview Pre-industrial society, mob football and real tennis Industrialisation, urbanisation and rational recreation Association football, lawn tennis and Victorian athletics Amateurs, professionals and women in Victorian sport The Golden Triangle of sport, media and sponsorship Professionalism and elite women's sport since 1950

Equal Opportunities in Sport

Topic overview Society, socialisation and social structures Social action theory, prejudice and stereotyping Barriers and solutions for women and ethnic minority groups Barriers and solutions for disabled and disadvantaged groups Benefits of participation, Sport England and its partners

Diet and Nutrition

Topic overview Carbohydrate, fibre and fats for exercise Protein, vitamins and minerals Hydration before, during and after exercise Creatine, sodium bicarbonate, caffeine and glycogen loading

Preparation and Training Methods

Topic overview Fitness testing: data, validity and reliability Warm-up, cool-down and stretching Principles of training and FITT Periodisation, tapering and peaking Training methods for fitness and health

Injury Prevention and Rehabilitation

Topic overview Acute and chronic sports injuries Screening, protective equipment, flexibility and taping Rehabilitation methods and their physiological basis Recovery methods, sleep and nutrition

Biomechanical Principles and Levers

Topic overview Newton's laws of linear motion Speed, distance and scalar quantities Centre of mass and stability Lever classes and mechanical advantage

Linear and Angular Motion

Topic overview Forces acting in linear motion Vectors: displacement, velocity, acceleration and momentum Impulse and force–time graphs in sprinting Angular motion and conservation of angular momentum

Projectile Motion and Fluid Mechanics

Topic overview Factors affecting horizontal displacement Flight paths and vector components of projectiles Drag and dynamic fluid force Lift and the Bernoulli principle

Personality and Attitudes

Topic overview Trait and social learning theories of personality The interactionist perspective in sport The triadic model and how attitudes form Changing attitudes: cognitive dissonance and persuasive communication

Arousal and Anxiety

Topic overview Drive theory and the inverted-U Catastrophe theory, the zone of optimal functioning and peak flow Somatic, cognitive, trait and state anxiety Measuring anxiety

Aggression

Topic overview Aggression and assertive behaviour Theories of aggression Strategies to control aggression

Motivation and Achievement Motivation

Topic overview Intrinsic and extrinsic motivation Atkinson's model: need to achieve and need to avoid failure Incentive value and probability of success Achievement goal theory and approach behaviour

Social Facilitation and Group Dynamics

Topic overview Zajonc's model of social facilitation Evaluation apprehension and coping with an audience Tuckman's model and team cohesion Steiner's model, the Ringelmann effect and social loafing

Goal Setting

Topic overview Outcome, performance and process goals Why goal setting works SMARTER goal setting

Attribution Theory

Topic overview The attribution process and Weiner's model Attribution, task persistence and self-serving bias Learned helplessness, general and specific Attribution retraining and overcoming helplessness

Self-Efficacy and Confidence

Topic overview Self-efficacy, self-confidence and self-esteem Bandura's model of self-efficacy Vealey's model of sport confidence Home field advantage and building self-efficacy

Leadership

Topic overview Effective, prescribed and emergent leaders Autocratic, democratic and laissez-faire styles Fiedler's contingency theory Chelladurai's multi-dimensional model

Stress Management

Topic overview Stress, stressors and the warm-up Mental rehearsal, visualisation and imagery Attentional control, thought stopping and self-talk Somatic relaxation techniques

Concepts of Physical Activity and Sport

Topic overview Physical recreation and sport Physical education and school sport The sports development continuum

Development of Elite Performers

Topic overview Talent identification and progression factors National governing bodies, national institutes and UK Sport Support services for talent development World Class Programme and UK Sport talent schemes

Ethics and Violence in Sport

Topic overview Amateurism, sportsmanship and the win ethic Positive and negative deviance Causes and implications of violence in sport Preventing violence among performers and spectators

Drugs in Sport

Topic overview Why elite performers use drugs EPO, anabolic steroids and beta blockers Consequences of drug taking for sport and performer Eliminating drugs and the testing debate

Sport, the Law and Commercialisation

Topic overview The law and the sports performer Negligence, duty of care and spectator law Commercialisation, the performer and the coach Commercialisation, officials, audiences and the sport

Technology in Sport

Topic overview Collecting and analysing sports data Functions of sports analytics Sports equipment and facilities Benefits and drawbacks of sports technology

The Neuromuscular System

4 subtopics
12 things to know
Paper 1

What The Neuromuscular System covers

The Neuromuscular System is examined in Paper 1, Factors affecting participation in physical activity and sport. It covers muscle fibre types and their characteristics, the nervous system and motor units, summation, the all-or-none law and tetanic contraction and muscle spindles, Golgi tendon organs and PNF.

Where it is assessed

Paper 1

Factors affecting participation in physical activity and sport, 2 hours and 35% of the A-level.

Check the AQA specification ↗

The 4 subtopics

Each one has its own page.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Key term

What are the three muscle fibre types, and what suits slow twitch fibres to endurance?

Key term

What is a motor unit, and how do motor units differ between muscles for fine and gross movements?

Key term

What are proprioceptors, and how do muscle spindles trigger the stretch reflex?

Key term

State the all-or-none law.

Key term

Name the three muscle fibre types.

Key term

Name the two main divisions of the nervous system.

Key term

What decides whether a motor unit is recruited?

Key term

What are proprioceptors?

Key term

Why are slow twitch fibres suited to endurance?

Key term

What does the autonomic nervous system control?

Key term

If a motor unit cannot contract partially, how does a muscle grade its force?

Key term

Where are muscle spindles found, and what do they detect?

Take The Neuromuscular System further

The same content, four other ways.

Commonly confused

Pairs that lose marks when they are blurred together.

Slow twitch fibre vs Fast glycolytic fibre
Slow twitch fibre: a muscle cell suited to endurance, with many mitochondria and high myoglobin. Fast glycolytic fibre: a muscle cell producing rapid, powerful contractions that tire within seconds.
Muscle spindle vs Golgi tendon organ
Muscle spindle: a proprioceptor within the belly detecting the length and rate of stretch. Golgi tendon organ: a proprioceptor near the attachment point that senses tension and triggers relaxation.
Spatial summation vs Wave summation
Spatial summation: an increase in force from recruiting more and larger motor units. Wave summation: an increase in force from repeated impulses arriving before the fibres relax.

Questions from this topic

Each one with the model answer underneath.

1
Name the three muscle fibre types.
Model answer
The three types are slow twitch (type I), fast oxidative glycolytic (type IIa) and fast glycolytic (type IIx).
2
Why are slow twitch fibres suited to endurance?
Model answer
Slow twitch fibres have many mitochondria, a high myoglobin content and a dense capillary network. Slow twitch fibres produce ATP aerobically and resist fatigue.
3
Describe the contraction speed and force of slow twitch fibres.
Model answer
Slow twitch fibres contract slowly and produce low force. Slow twitch fibres can keep contracting for long periods.
4
Why do slow twitch fibres appear red?
Model answer
Slow twitch fibres contain a lot of myoglobin and are supplied by many capillaries. The myoglobin and blood give the fibres a red colour.
5
What are the main characteristics of fast glycolytic (type IIx) fibres?
Model answer
Fast glycolytic fibres contract very quickly and produce the greatest force. Fast glycolytic fibres fatigue rapidly because they rely on anaerobic ATP production.
6
Why do fast glycolytic fibres have high stores of phosphocreatine and glycogen?
Model answer
Fast glycolytic fibres produce ATP anaerobically. Large stores of phosphocreatine and glycogen fuel the ATP-PC and anaerobic glycolytic systems.

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The Cardiovascular System

The Respiratory System

The Neuromuscular System

The Musculo-Skeletal System and Movement Analysis

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The Neuromuscular System revision questions

What does The Neuromuscular System cover in AQA A-Level Physical Education?: 4 subtopics: muscle fibre types and their characteristics, the nervous system and motor units, summation, the all-or-none law and tetanic contraction and muscle spindles, golgi tendon organs and pnf. Each one has its own page with questions and model answers.
How is The Neuromuscular System organised?: By the AQA 7582 specification, subtopic by subtopic, so it matches the order you are taught it in.

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