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Core 2: Factors affecting performance
How does the body respond to aerobic training?
Stroke volume
Stroke volume (SV) is the amount of blood pumped out of the left ventricle of the heart during contraction. It is measured in millilitres.
The following graph shows how stroke volume changes during exercise. The vertical axis is in millilitres as it describes the amount or volume of blood pumped out of the heart per beat. The horizontal axis is heart rate (HR) which is the number of heart beats per minute.
Note: Heart rate is an accurate indicator of the intensity of the activity being undertaken. Therefore, it is an appropriate standard that can be used to compare other physical changes.
How does the intensity of exercise affect stroke volume?
Examine the following graphs and answer the questions in the student activity.
Student activity |
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Describe the stroke volume between the
following points on the graph. Give reasons for the
changes in stroke volume.
Check your answers here. 
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