IGCSEBiologyCIERevision Notes11. Gas Exchange in Humans11.1 Gas Exchange in Humans11.1.5 Investigating the Effects of Physical Activity on Breathing

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

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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

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    Lára

    Author: Lára

    Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.