Outline the relationship between stroke volume and training intensity during exercise. (3 marks)
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Sample Answer
- Stroke volume increases progressively as exercise intensity rises from rest. This continues up to approximately 40-60% of maximum intensity.
- Beyond this point, stroke volume plateaus at its maximum level. Further intensity increases do not produce additional stroke volume gains.
- At very high intensities, stroke volume may decrease slightly. This occurs because rapid heart rate reduces ventricular filling time.
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Sample Answer
- Stroke volume increases progressively as exercise intensity rises from rest. This continues up to approximately 40-60% of maximum intensity.
- Beyond this point, stroke volume plateaus at its maximum level. Further intensity increases do not produce additional stroke volume gains.
- At very high intensities, stroke volume may decrease slightly. This occurs because rapid heart rate reduces ventricular filling time.