A2- EPOC

• OBLA graph

  A) onset of blood lactate accumulation

  B) untrained

  C) trained

  D) 4

  E) blood lactate

  F) exercise intensity

  
• what is lactate sampling?

  • taking regular blood samples during a progressive maximal test
  • accurately identify a performers lactate threshold (OBLA)
• what is anaerobic threshold?

  the point at which energy production changes from being predominantly aerobic to anaerobic
• what are the advantages to knowing OBLA? (4)

  • can maximise aerobic adaptations by training at an intensity just below anaerobic threshold
  • you can set accurate training intensities and targets
  • you can measure improvement over time
  • lactate threshold occurs as a % of VO2 max
• what does a trained aerobic muscle have the ability to do?

  • delay obla -> work longer at higher intensity
  • increased buffering capacity
• how can lactic acid be removed? (3)

  • O2 supply -> oxidise in mitochondria ( convert pyruvic + waste products [Co2 + H2O] in mitochondria
  • corrie cycle -> covert lactic acid to liver glycogen store
  • excrete it -> sweat/urine
• what does EPOC stand for?

  excess post exercise oxygen consumption
• define oxygen deficit?

  the amount of oxygen required to complete the exercise if all the energy could have been supplied aerobically
• defin oxygen debt?

  the amount of oxygen consumed during recovery above that which normally would have been consumed at rest in the same period of time
• EPOC graph

  A) oxygen deficit

  B) oxygen consumption during exercise

  C) fast component

  D) slow conponent

  E) recovery

  F) exercise

  G) rest

  H) v02

  
• what occurs in epoc fast component?

  -> 2/4 litres of O2 taken in 2/3 mins after exercise

  • Restore ATP + PC stores

  -> 50% in 30 secs

  -> 100% in 2/3 mins

  • resaturate myoglobin and haemoglobin stores
• what occurs in epoc slow component?

  • extra oxygen is used to:

  -> remove lactic acid to replenish muscle glycogen

  -> regulate body temperature

  -> supply oxygen to meet demand of the increased heart rate and breathing rate during recovery (cool down)