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Chapter 15: Oxygen Debt
Transcript of Chapter 15: Oxygen Debt
Oxygen debt is defined as: The amount of oxygen consumed during
above that which would have ordinarily been consumed in the same time at rest (this results in a shortfall in the oxygen available).
Close your eyes and count how many times you breathe in a minute. (Count the number of time your chest rises).
for oxygen is greater than the
Or put more simply...
Q:How many times do we breathe in a minute?
Write down your score..
Average (Resting) Breathing rate for a 14 year old is:13-20 breaths per minute
Stand behind your chair make sure you have space..
Run as hard as you can on the spot for 20 seconds whilst holding your breath.
Count how many breathes you take in a minute
Record you results and re - count
hy does the body need
ots of oxygen to recover after strenuous exercise? (2 marks)
exercise? Write in your books why. (1 mark)
Aerobic: 'With oxygen' if exercise is not too fast and is steady, the heart can supply all the oxygen muscles need.
Anaerobic: 'Without oxygen'. If exercise is done in short, fast bursts, the heart cannot supply blood and oxygen to muscles as fast as the cells use them.
Working with the person next to you develop a model answer for the following Qs:
Bronze: During a match a player is likely to build up an oxygen debt. What is an oxygen debt? (1)
Silver: (ii)If a player has built up an oxygen debt will she have been working more aerobically or more anaerobically? (1)
Gold: (iii)What by-product is associated with an oxygen debt? (1)
Gold: (iv)State TWO ways in which the performer could help remove this bi-product. (2).
(Total 5 marks)
(i) A lack of oxygen 1
(ii) Anaerobically 1
(iii) Lactic acid 1
(iv) Reduce workload/equiv; breathe more deeply/rapidly 1
Cool down 1
Or put even more simply ...
"A lack of Oxygen"
Breathing rate and heart rate are elevated (to remove CO2) and this needs more oxygen.
C02 and Lactic acid
To remove waste products.
: What waste products?
What would happen to the
if we did
: It would take
for the body to recover because the activity has a
constant supply of oxygen
is constantly being
What happened to your breathing rate immediately after exercise, and during the
Hopefully your breathing rate would have begun to return to a normal resting rate.
How can we help our body recover faster?
Increase breathing rate
Take deep breaths
You have 2 mins to
this definition and partner check.
Bronze: To be able to
what Oxygen debt is.
Silver: As above. Be able to understand the
respiration and how they both affect Oxygen Debt
Gold: As above. Be able to
why oxygen debt occurs and identify
of how to
Mark your work