Investigating the Effects of Physical Activity on Breathing (Cambridge (CIE) IGCSE Biology)

Investigating the Effects of Physical Activity on Breathing

• Exercise increases the frequency and depth of breathing

• This can be investigated by counting the breaths taken during one minute at rest and measuring average chest expansion over 5 breaths using a tape measure held around the chest

• Exercise for a set time (at least 3 minutes)

• Immediately after exercising, count the breaths taken in one minute and measure the average chest expansion over 5 breaths

• Following exercise, the number of breaths per minute will have increased and the chest expansion will also have increased