1. Challenge – use data to make comparisons
Fitness and breathing /05/2019
Complete your starter sheet on:
the differences between inhaled and exhaled air
Challenge – use data to make comparisons
inhaled air
nitrogen (78%)
oxygen (21%)
carbon dioxide (0.04%)
other
exhaled air
nitrogen (78%)
oxygen (17%)
carbon dioxide (4%)
other

2. Fitness and breathing 15/05/2019
Be able to:
test the difference exercise makes to breathing rate
Understand:
why breathing rate is affected by exercise

3. (in and out) you take in one minute
Count how many breaths
(in and out) you take in one minute
Record your results and start to think about how this would be affected by exercise

4. Breathing and exercise??
What do you think will happen to the number of breaths you take after exercise? Why? (Link back to respiration again)
energy
glucose
oxygen
carbon
dioxide
water

5. Resting breathing rate
In pairs, count how many breaths you take for 1 minute.
Resting breathing rate
per minute
(before exercise)
Breathing rate
per minute 
(after 5 mins of exercise)
Student to copy table down. Pupils use stop watches individually to time each other’s resting breathing rate or use online timer to do 1 min twice for each pair.
Online timer

6. Breathing rate after exercise
Online timer
Breathing rate after exercise
Intensity of exercise?
Type of exercise?
When to start counting after exercise?
Resting breathing rate
per minute
(before exercise)
Breathing rate
per minute 
(after 5 mins of exercise)
You can do this indoors if you clear some space in the classroom but limit type to something on the spot and no RUNNING in the LAB!
Discuss the factors to consider for a fair test. Ideas for discussion on method sheet in italics. Also good idea to make a fool of yourself demoing what not to do. E.g.
Run on the spot really fast, act puffed out and then slow down… why was that not a fair test guys? Or start doing star jumps and then change to jogging on the spot.

7. Conclusion Keywords: exercise, resting/ breathing rate,
breaths per minute, increased, decreased

8. Scientific explanation:
My breathing rate _____________ after exercise because:
energy
glucose
oxygen
carbon
dioxide
water

9. Conclusion
Before exercise my breathing rate was______ breaths per minute. After exercise my breathing rate was ______ breaths per minute. This shows the number of breaths I took after exercise increased/ decreased.
Support conclusion

10. Scientific explanation:
increased
My breathing rate _____________ after exercise because:
Keywords: breaths, move, muscles,
energy, respiration, oxygen, increase, cells
When I exercise I am making my _____________ work harder. This means I need more _______ for movement. In order to do this I need to _________ the number of ______ I take to bring more __________ in for _______________. The ______ in my muscles can then respire more often giving me more energy to ______.
muscles
energy
increase
breaths
oxygen
respiration
cells
move
energy
glucose
oxygen
carbon
dioxide
water

11. Explain to pupils that this is not a measure of total lung capacity and that some air will still remain in their lungs. Demonstrate the technique to pupils first. The link is after exercise we could increase our lung capacity. It’s a measure of fitness.
They should be encouraged to breathe out slowly through the tube and watch their breath displace the water in the reservoir.
They can then read off the scale, the volume of breath that they breathed out.

12. Results What was your vital capacity?
What was the average vital capacity for boys in your class?
What was the average vital capacity for girls in your class?
Apart from gender, suggest two other things that could change your vital capacity.
4. exercise, smoking, age etc.