Investigating Effect of Physical Activity on Heart Rate (Cambridge International IGCSE Biology)

Spec point — 9.2.4 · Investigate and describe the effect of physical activity on the heart rate

Investigating effect of physical activity on heart rate

• It is relatively simple to investigate the effects of exercise on the body in the classroom

• Breathing rate can be measured by counting the number of breaths per minute, while heart rate can be measured by taking a pulse

• Either can be measured before and after an activity is performed and the results plotted on a bar chart

  • It is important that the time over which breathing rate and pulse rate are measured is consistent, and that individuals fully recover (rest) before starting a new activity

• Increased physical activity results in an increased heart rate and breathing rate

  • Heart rate remains high for a period of time after physical activity has stopped, there is a gradual return to resting heart rate