Investigations+on+the+effect+of+exercise+on+the+breathing+system


 * 2.48 Describe simple experiments to investigate the effect of exercise on breathing in humans**

1. Record your resting breathing or pulse rate.

__To avoid inaccuracies and changes in rates measure over 15 seconds then x 4 to get beats/breaths per minute__

2. Choose one of the following to investigate: a. How the intensity or the length of exercise affects breathing or pulse rate b. How quickly your body recovers after exercise?

3. In groups of 2 or 3 decide upon your method and carry out your investigation

4. You will need to produce a short report including: a. Aim b. Method c. Results d. Graph

5. If you are looking at ‘How the intensity/length of exercise affects breathing or pulse rate’ then answer the question ‘Why does your pulse and breathing rate increase?’. Use the following words in your answer: muscle cells, lungs heart, blood, oxygen, glucose respiration, energy.

6. If you are looking at ‘How quickly your body recovers after exercise?’ then answer the question ‘why does your pulse rate take time to drop back to normal after exercise?’. Use the following word in your answer: anaerobic respiration, oxygen debt, lactic acid, muscle cells, heart, lungs.

N.B. When you write this up task 4 can be done as a group whilst 5 or 6 (as appropriate) should be your own work.