Lung volumes

Question 1

Lung volumes

Answer 1

• The movement of air in and out of the lungs:
  1. Inspiration= taking in air.
  2. Expiration= moving air out.

Question 2

Why are lung volumes important in sports?

Answer 2

• Lung volumes are important in sport and exercise as they dictate how much oxygen we take into our body and how much CO2 moves out.

Question 3

Define tidal volume

Answer 3

• the volume of air breathed in or out per breath.

Question 4

What is tidal volume at rest?

Answer 4

• 0.5 litres

Question 5

What happens to tidal volume during exercise?

Answer 5

• During exercise tidal volume increases, as we have to get more oxygen into our body and more CO2 out.

Question 6

Define minute ventilation

Answer 6

• The volume of air breathed in or out per minute.

Question 7

How do you calculate minute ventilation?

Answer 7

Number of breaths (per min) x tidal volume.

Question 8

What happens to minute ventilation during exercise?

Answer 8

During exercise minute ventilation increases significantly as we have to get more oxygen into our body and more CO2 out.

Question 9

Define inspiratory reserve volume.

Answer 9

• The volume of air forcefully breathed in after a normal breath.

Question 10

Define expiratory reserve volume

Answer 10

• The volume of air forcefully breathed out after a normal breath.

Question 11

What happens to both reserve volumes during exercise?

Answer 11

• During exercise both Inspiratory and Expiratory reserve volumes decrease, this is because the tidal volume has increased.

Question 12

Define residual volume

Answer 12

• The volume of air that remains in the lungs after maximal expiration.