1. 4.13 (a) To investigate the effect of exercise on the breathing rate of a human

2. Before you start get or make a copy of this Table of results
Before exercise
Trial 1
Trial 2
Trial 3
Total
Average
Resting breathing rate (breaths per minute)
Activity
Standing
Gentle walking
Brisk walking
Running
Breathing rate (breaths per minute)

3. Sit down on a chair and take 5 minutes to settle.
Step 1
Sit down on a chair and take 5 minutes to settle.

4. Count the number of breaths per minute and record.
Step 2
Count the number of breaths per minute and record.

5. Repeat step 2 twice and calculate the average.

6. Stand up. Immediately measure the breathing rate and record.
Step 4
Stand up. Immediately measure the breathing rate and record.

7. Walk gently for 5 minutes. Measure the breathing rate and record.
Step 5
Walk gently for 5 minutes. Measure the breathing rate and record.

8. Walk briskly for 5 minutes. Measure the breathing rate and record.
Step 6
Walk briskly for 5 minutes. Measure the breathing rate and record.

9. Run for 5 minutes. Measure the breathing rate and record.
Step 7
Run for 5 minutes. Measure the breathing rate and record.

10. Compare the breathing rates after the different levels of exercise
Result
Compare the breathing rates after the different levels of exercise

11. Expected result No. of breaths per minute
Sit Gentle walk Brisk walk Run
No. of breaths per minute

12. Tables of results Before exercise Trial 1 Trial 2 Trial 3 Total
Average
Resting breathing rate (breaths per minute)
Activity
Standing
Gentle walking
Brisk walking
Running
Breathing rate (breaths per minute)

13. END