OBLA

• What happens to oxygen consumption as exercise intensity increases?

  It increases until VO2 max is reached
• What occurs when exercise intensity surpasses the lactate threshold?

  Increased intensity leads to anaerobic ATP resynthesis
• When does anaerobic ATP resynthesis occur?

  When there is insufficient oxygen in mitochondria
• What does a longer ability to hold off lactate accumulation indicate about a performer?

  They are fitter
• What does OBLA stand for?

  Onset of blood lactic acid accumulation
• At what concentration does lactic acid start to accumulate in the blood?

  Above $4 \text{ mmol per litre}$
• What occurs when there is insufficient oxygen available?

  Lactic acid accumulates in the blood
• How does OBLA relate to fitness levels?

  • OBLA indicates the onset of lactic acid accumulation
  • Higher fitness levels allow for higher exercise intensity before OBLA
  • It reflects an athlete's endurance capacity