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Core 2: Factors affecting performance
How does the body respond to aerobic training?
Ventilation rate
Ventilation rate (VE) refers to the total volume per minute of air taken into the lungs. It can be established by multiplying the number of breaths per minute by the volume of air taken in and out during each breath. This is measured in litres per minute.
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Ventilation rate =
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No. of breaths per minute x volume
of air per
breath (litres per minute) |
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How does exercise affect ventilation rate?
The following graph shows how the ventilation rate changes during exercise. In the graph, the vertical axis indicates the litres of air the lungs respire (breathed in and out). The horizontal axis describes the amount of time (in minutes). Pre-exercise is represented by "minus" time. Zero onwards represents the time during exercise, whilst post-exercise time is indicated by "plus" time in minutes.
Examine the following graphs and answer the questions in the student activity.
Student activity |
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Describe what is happening during exercise at the following points on the graph. Give reasons for the ventilation rates at each time.
Check your answers here. |
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