CIE IGCSE Biology: 复习笔记：9.1.5 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 has stopped, there is a gradual return to resting heart rate

转载自savemyexams