A2 Sport and PEV02MAX Testingand OBLA
Learning Outcomes• Define Vo2max and OBLA• Explain the physiological affects onVo2 MAX• Relate Vo2MAX to OBLA• Explain the...
Vo2 MAX• What is it?• The amount of oxygen the body cantake in and use in one minute.• MASSIVELY IMPORTANT• Why?• Gives an...
Vo2 MAX• Average for ALevel students:• Male: 45-55mlkg -1• Female: 35-44ml kg-1
World Records• Men – 96 ml kg-1• Norwegian CrossCountry Skiier• Women – 78.6 mlkg-1• 1984 OlympicMarathon Champion
Factors Affecting Vo2Max• What affects this?• The amount of capillaries around the lungs and theworking muscles• The amoun...
Training Effects• Regular aerobic training raises V02 Max, dueto:• Increased cardiac output and stroke volume• Increased h...
Training Effects• Why do these effects occur withaerobic training?• You’re forcing the body to either findmore oxygen, or ...
Evaluating V02Max• Almost all tests areMAXIMAL……• Full pelt, to the point ofexhaustion.• Douglas bag• Multistage fitness t...
OBLA• Stands for…….?• Onset of BloodLactateAccumulation• And this means…..?• The point at whichthe muscle can nolonger get...
OBLA• Normal amount of lactate in the blood:• 1 ml/kg• OBLA occurs at:• 4 ml/kg• Once the blood contains four times asmuch...
OBLA and Vo2MAX• Average person reaches OBLA at• 40% of Vo2MAX• Meaning that the average person canonly work at less than ...
OBLA• The affects of OBLA:• Stops oxygen being collected by thehaemoglobin• Causes the pH of the blood to risecausing pain...
OBLA• If the intensity of the activity increases,the performer will have to switch fromusing aerobic capability to anaerob...
Factors Affecting OBLA• Intensity of exercise – compare short burst,high intensity to long distance, steady state.• Muscle...
Questions• It is important as a games player to have agood V02Max. What is meant by the termV02Max? (2 marks)• Suggest fiv...
Learning Outcomes• Define Vo2max and OBLA• Explain the physiological affects onVo2 MAX• Relate Vo2MAX to OBLA• Explain the...
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OBLA and VO2 max testing

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OBLA and VO2 max testing

  1. 1. A2 Sport and PEV02MAX Testingand OBLA
  2. 2. Learning Outcomes• Define Vo2max and OBLA• Explain the physiological affects onVo2 MAX• Relate Vo2MAX to OBLA• Explain the effects of your training onyour own V02MAX scores and yourown OBLA.
  3. 3. Vo2 MAX• What is it?• The amount of oxygen the body cantake in and use in one minute.• MASSIVELY IMPORTANT• Why?• Gives an accurate idea of how well aperson’s body can perform over a longperiod of time OR how intense they willbe able to perform.
  4. 4. Vo2 MAX• Average for ALevel students:• Male: 45-55mlkg -1• Female: 35-44ml kg-1
  5. 5. World Records• Men – 96 ml kg-1• Norwegian CrossCountry Skiier• Women – 78.6 mlkg-1• 1984 OlympicMarathon Champion
  6. 6. Factors Affecting Vo2Max• What affects this?• The amount of capillaries around the lungs and theworking muscles• The amount of haemoglobin in the blood• The type of training (or otherwise) the muscle hasbeen through.• Gender – women have smaller left ventricles, lowerstroke volumes, lower haemoglobin levels and lowerrespiratory levels.• Age – the older you get the lower your heart ratebecomes (5-7 beats lost per decade), lower vitalcapacity and lower blood pressure.
  7. 7. Training Effects• Regular aerobic training raises V02 Max, dueto:• Increased cardiac output and stroke volume• Increased haemoglobin• Increased glycogen stores• Increased OBLA (more on that in a minute)• Reduced body fat (therefore less oxygenbeing used for the energy systems)
  8. 8. Training Effects• Why do these effects occur withaerobic training?• You’re forcing the body to either findmore oxygen, or create ways of gettingthe oxygen from the lungs to theworking muscle.• Various methods of achieving this…..
  9. 9. Evaluating V02Max• Almost all tests areMAXIMAL……• Full pelt, to the point ofexhaustion.• Douglas bag• Multistage fitness test(bleep test)• Harvard step test• Cooper 12 minute run
  10. 10. OBLA• Stands for…….?• Onset of BloodLactateAccumulation• And this means…..?• The point at whichthe muscle can nolonger get rid of thelactic acid and itbegins to pool in theblood
  11. 11. OBLA• Normal amount of lactate in the blood:• 1 ml/kg• OBLA occurs at:• 4 ml/kg• Once the blood contains four times asmuch lactic acid as normal, it can nolonger operate the energy systemseffectively and the body begins to slowand eventually fail.
  12. 12. OBLA and Vo2MAX• Average person reaches OBLA at• 40% of Vo2MAX• Meaning that the average person canonly work at less than half theirmaximum ability before fatigue sets in.• Endurance athlete reaches OBLA at• 85% of Vo2MAX• The endurance trained athlete canwork at almost maximum before fatigueset in.
  13. 13. OBLA• The affects of OBLA:• Stops oxygen being collected by thehaemoglobin• Causes the pH of the blood to risecausing pain in the working muscle• Also decreases the amount of oxygenthat can be used for phosphorylation.• Will eventually lead to the musclefailing – you collapse!
  14. 14. OBLA• If the intensity of the activity increases,the performer will have to switch fromusing aerobic capability to anaerobic,which results in…….?• Increased lactate build up.
  15. 15. Factors Affecting OBLA• Intensity of exercise – compare short burst,high intensity to long distance, steady state.• Muscle fibre type being used – more on thatlater.• The ability of the body to remove and oxidiselactate.• Training adaptations to exercise.
  16. 16. Questions• It is important as a games player to have agood V02Max. What is meant by the termV02Max? (2 marks)• Suggest five structural and/or physiologicalcauses of the difference in V02max betweena trained and an untrained individual. (5marks)• Describe and explain how lactate thresholdvaries as fitness improves. (3 marks)
  17. 17. Learning Outcomes• Define Vo2max and OBLA• Explain the physiological affects onVo2 MAX• Relate Vo2MAX to OBLA• Explain the effects of your training onyour own V02MAX scores and yourown OBLA.

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