How do I revise E2E stub topic for Pearson A-Level?

When comparing energy systems, use precise timings (e.g., ATP-PC: 0–10 seconds; glycolysis: 10–90 seconds; aerobic: >90 seconds) and support with sporting examples.

What exam tips are there for E2E stub topic? (2)

In extended responses, always discuss the interdependence of systems and the concept of threshold intensities (e.g., lactate threshold, VO2 max).

What exam tips are there for E2E stub topic? (3)

For EPOC questions, clearly separate the fast alactacid component and the slow lactacid component, referencing restoration processes and elevated heart rate/temperature.

What mistakes should I avoid in E2E stub topic?

Believing that the lactic acid system produces lactic acid rather than lactate, and attributing fatigue directly to lactate accumulation.

What are common errors in E2E stub topic exams? (2)

Thinking that energy systems operate in isolation rather than as an integrated continuum.

E2E stub topic

PEARSON

A-Level

This subtopic focuses on the body's energy systems during physical activity, examining how ATP is resynthesised through the ATP-PC system, anaerobic glycolysis, and aerobic metabolism. It explores the interplay of these systems across different exercise intensities and durations, leading to the concept of the energy continuum. Understanding these processes is vital for analysing performance, prescribing training, and explaining recovery phenomena such as excess post-exercise oxygen consumption (EPOC).

Objectives

Exam Tips

Pitfalls

Key Terms

Mark Points

What You Need to Demonstrate

Key skills and knowledge for this topic

Award credit for correctly identifying ATPase as the enzyme that hydrolyses ATP.
Award credit for describing the coupled reaction where phosphocreatine donates a phosphate to ADP.
Award credit for detailing the fate of pyruvate under anaerobic conditions, including the role of lactate dehydrogenase.
Award credit for explaining that all three energy systems contribute simultaneously, with one predominating based on intensity and duration.
Award credit for linking the fast component of EPOC to phosphocreatine and myoglobin oxygen replenishment and the slow component to elevated metabolism and lactate removal.

Marking Points

Key points examiners look for in your answers

Award credit for correctly identifying ATPase as the enzyme that hydrolyses ATP.
Award credit for describing the coupled reaction where phosphocreatine donates a phosphate to ADP.
Award credit for detailing the fate of pyruvate under anaerobic conditions, including the role of lactate dehydrogenase.
Award credit for explaining that all three energy systems contribute simultaneously, with one predominating based on intensity and duration.
Award credit for linking the fast component of EPOC to phosphocreatine and myoglobin oxygen replenishment and the slow component to elevated metabolism and lactate removal.

Examiner Tips

Expert advice for maximising your marks

💡When comparing energy systems, use precise timings (e.g., ATP-PC: 0–10 seconds; glycolysis: 10–90 seconds; aerobic: >90 seconds) and support with sporting examples.
💡In extended responses, always discuss the interdependence of systems and the concept of threshold intensities (e.g., lactate threshold, VO2 max).
💡For EPOC questions, clearly separate the fast alactacid component and the slow lactacid component, referencing restoration processes and elevated heart rate/temperature.

Common Mistakes

Pitfalls to avoid in your exam answers

Believing that the lactic acid system produces lactic acid rather than lactate, and attributing fatigue directly to lactate accumulation.
Thinking that energy systems operate in isolation rather than as an integrated continuum.
Confusing oxygen deficit with EPOC, and failing to distinguish between the fast and slow components of recovery.
Assuming that aerobic metabolism only uses carbohydrates, ignoring the role of fats and proteins in prolonged exercise.

Key Terminology

Essential terms to know

ATP-PC system

Anaerobic glycolysis

Aerobic metabolism

Energy continuum

Lactate production and clearance

EPOC and recovery

Ready to test yourself?

Practice questions tailored to this topic

E2E stub topic

What You Need to Demonstrate

Marking Points

Examiner Tips

Common Mistakes

Key Terminology

Ready to test yourself?

Related Topics in PEARSON A-Level Physical Education

Biomechanics

Sport psychology

Applied anatomy and physiology

Skill acquisition