1. VCE Physical Education - Unit 3
Chapter 5
Oxygen Uptake, Oxygen Deficit and Oxygen Debit
Text Sources
Nelson Physical Education VCE Units 3&4: 4th Edition – Malpeli, Horton, Davey and Telford 2006.
2. Live It Up 2: 2nd Edition – Smyth, Brown, Judge, McCallum and Pritchard 2006.
VCE Physical Education - Unit 3

2. Oxygen Uptake, Oxygen Deficit and Oxygen Debit
Body Systems Revision
Oxygen Uptake, Oxygen Deficit and Oxygen Debit

3. Body Systems - Respiratory
VCE Physical Education - Unit 3

4. Body Systems - Circulatory
VCE Physical Education - Unit 3

5. Body Systems - Muscular
VCE Physical Education - Unit 3

6. Muscle Structure Overview
VCE Physical Education - Unit 3

7. Oxygen Uptake, Oxygen Deficit and Oxygen Debit

8. Delivery of Oxygen to the Working Muscles
The respiratory system is responsible for the extraction of oxygen from the atmosphere. This process is called ventilation.
Diffusion – Exchange of gases based on concentration levels (High to low). Occurs at a cellular level (In the lungs and in the muscle cell)
Cardiac output (Heart rate x stroke volume) - The heart pumps out oxygenated blood to the vascular system.
Oxygen combines with haemoglobin in the
blood
Myoglobin, in the muscle attracts the oxygen
from the blood and draws it into the mitochondria.
Waste produces of aerobic metabolism is
removed from the muscle cell via diffusion.
See fig 5.2 p.119
VCE Physical Education - Unit 3

9. VCE Physical Education - Unit 3
Oxygen Uptake
Limiting factors to oxygen uptake;
Respiratory system – ability to take in oxygen
Cardiovascular system – ability to transport and deliver oxygen
Muscular system – Utilisation of oxygen
Type of exercise performed, genetic inheritance, lifestyle, age and gender.
VCE Physical Education - Unit 3

10. VCE Physical Education - Unit 3
Limitations to VO2 Max
VCE Physical Education - Unit 3

11. VCE Physical Education - Unit 3
Oxygen Uptake - Sports
VCE Physical Education - Unit 3

12. Heart Rate and Oxygen consumption
When exercising;
Our heart rate increases to meet the oxygen demands for the working muscles.
The relationship between HR and oxygen consumption is linear.
Trained athletes are able to utilise their oxygen uptake more efficiently than non trained people.
See fig 5.3 p.119
VCE Physical Education - Unit 3

13. Heart Rate and Intensity
VCE Physical Education - Unit 3

14. VCE Physical Education - Unit 3
Checkpoints
Complete questions 1-4 page 119 of Nelson Physical Education VCE Units 3 & 4.
VCE Physical Education - Unit 3

15. Oxygen Uptake, Oxygen Deficit and Oxygen Debit

16. VCE Physical Education - Unit 3
Oxygen Deficit
Oxygen deficit occurs when the demand for oxygen exceeds the supply of oxygen available.
The body therefore needs to obtain ATP through anaerobic pathways.
Short duration/high intensity – Lactic acid is produced but is removed once oxygen demands are met.
Performance is hindered due to the presence of lactic acid
Once oxygen demands are met, the body reaches its steady state.
Aerobic glycolysis assists in the removal of lactic acid.
VCE Physical Education - Unit 3

17. VCE Physical Education - Unit 3
Oxygen Consumption
VCE Physical Education - Unit 3

18. VCE Physical Education - Unit 3
Checkpoints
Complete questions 1-4 page 120 of Nelson Physical Education VCE Units 3 & 4.
VCE Physical Education - Unit 3

19. Oxygen Uptake, Oxygen Deficit and Oxygen Debit
Acute Responses
Oxygen Uptake, Oxygen Deficit and Oxygen Debit

20. VCE Physical Education - Unit 3
Acute Responses
Acute responses occur to supply extra oxygen and nutrients to support ATP production.
Acute responses include;
Reduction in creatine stores
Accumulation of lactic acid
Increase in epinephrine (Regulates BP and O2 consumption levels)
Reduction in glycogen stores
Increase in muscle temperature
Increase in cardiac output
Redistribution of blood to working muscles.
Responses are dependent on intensity, duration, fitness levels and type of activity used.
VCE Physical Education - Unit 3

21. VCE Physical Education - Unit 3
Acute Responses
Acute responses to exercise. Increase in;
Oxygen intake
Transport of oxygen
Extraction of oxygen from the blood
Consumption of oxygen by working muscles
Continues until maximum uptake is met (VO2 max)
VCE Physical Education - Unit 3

22. VCE Physical Education - Unit 3
Checkpoints
Complete questions 1-3 page 122 of Nelson Physical Education VCE Units 3 & 4.
VCE Physical Education - Unit 3

23. Oxygen Uptake, Oxygen Deficit and Oxygen Debit
Oxygen Debt
Oxygen Uptake, Oxygen Deficit and Oxygen Debit

24. VCE Physical Education - Unit 3
Oxygen Debit
After exercise our demand for ATP decreases but we still need to ‘repay’ the oxygen needed during exercise.
This is why we puff after intense activities.
The higher the intensity and duration of activities, the longer the oxygen debit.
VCE Physical Education - Unit 3

25. EPOC
Another term used for oxygen recovery is EPOC – excess post-exercise oxygen consumption.
Alactacid Debt – Oxygen used to restore ATP and PC stores
Lactacid Debt - Oxygen used to remove lactic acid from cells/blood.
Additional oxygen is used to recover the energy systems.
EPOC
Fast Replenishment
(0  3 minutes)
Slow Replenishment
(0 minutes  hours)
ATP resynthesis
Return core temperature to pre-exercise levels
PC resynthesis
LA converted to CO2 & H2O
Absorption of H+ ions (buffering)
Restore oxygen to myoglobin
LA converted to glycogen, protein & glucose
Restoring heart rate, ventilation & other body systems to pre-exercise levels
VCE Physical Education - Unit 3

26. VCE Physical Education - Unit 3
Coursework 5.1 and 5.2
Complete the data analysis tasks on page 124 and 125 of Nelson Physical Education VCE Units 3 & 4.
VCE Physical Education - Unit 3

27. VCE Physical Education - Unit 3
Checkpoints
Complete questions 1-3 page 127 of Nelson Physical Education VCE Units 3 & 4.
VCE Physical Education - Unit 3

28. VCE Physical Education - Unit 3
Test Your Knowledge
Complete the review questions 1-4 page of Nelson Physical Education VCE Units 3 & 4.
VCE Physical Education - Unit 3

29. VCE Physical Education - Unit 3
Peak Performance
Complete the chapter questions on page of Nelson Peak Performance Physical Education VCE Units 3 & 4.
VCE Physical Education - Unit 3

30. VCE Physical Education - Unit 3
PHYS ED Notes
Read the summarised information of pages of PHYS ED Notes and complete the revision questions.
VCE Physical Education - Unit 3

31. VCE Physical Education - Unit 3
VCAA Questions
VCE Physical Education - Unit 3

32. VCE Physical Education - Unit 3
VCAA Questions
VCE Physical Education - Unit 3

33. VCE Physical Education - Unit 3
Web Links – Chapter 5
Interactive body and mind tests from the BBC UK:
Human anatomy:
Information about the body and anatomy – Virtual Body:
Article – Oxygen Deficit: A Measure of Anaerobic Capacity:
Information on the transport of oxygen in the blood, from the Australasian Society of Cardio-Vascular Perfusionists: and carbon dioxide transport.htm
Nicholas Institute of Sports Medicine and Athletic Trauma – A primer on maximum oxygen consumption:
Australian Sports Commission:
Sports Coach UK:
Australian Sports Commission:
Find 30 promotion (Government of WA Department of Health):
Walking School Bus promotion (UK):
Ministry of Health (New Zealand) toolkits:
The 10,000 Steps Rockhampton project:
Travelsmart Australia:
World Health Organisation:
Heart Foundation Australia:
VicHealth (The Victorian Health Promotion Foundation):
Be Active promotion (Government of South Australia):
Go For Your Life:
Physical Activity Resources for Health Professionals – Introduction (Centre for disease control and prevention – USA):
Health Promotion (Public Health Agency of Canada):
Strategic Inter-Governmental Forum on Physical Activity and Health (SIGPAH):
Healthy youth (Centre for disease control and prevention (USA):
America On The Move promotion:
Papers from the International Journal of Behavioural Nutrition and Physical Activity:
Department of health and aging (Australian government):
Building a healthy, active Australia (Australian government):
National Public Health Partnership:
Sport and Recreation Australia:
VCE Physical Education - Unit 3