Exam-Ready Explanations of Exercise Responses
Exercise response questions are common in IB Sports, Exercise and Health Science (SEHS) exams, and they often require clear, structured explanations rather than simple definitions. Many students understand the content but lose marks due to poor organisation, vague language, or missing links to exercise intensity.
Writing exam-ready responses means explaining what changes, why it changes, and how it supports performance.
Start with Clear Identification of the Response
High-scoring IB answers begin by clearly identifying the type of response being described. This helps examiners immediately recognise understanding.
For example:
- “Heart rate increases during exercise to…”
- “Ventilation rises as exercise intensity increases because…”
Avoid starting with general statements such as “the body changes” or “the system responds.” Precision is rewarded in IB SEHS.
Explain the Cause of the Response
After identifying the response, strong answers explain why it occurs. This demonstrates understanding rather than memorisation.
Key causes often include:
- Increased oxygen demand
- Increased carbon dioxide production
- Increased energy requirements
For example, heart rate increases to deliver more oxygen to working muscles and remove waste products more efficiently.
Link the Response to Exercise Performance
The final step in an exam-ready explanation is linking the response to performance or fatigue prevention.
Strong links include:
- Improved oxygen delivery
- Delayed onset of fatigue
- Ability to sustain higher exercise intensity
