OBLA

• What does OBLA stand for?

  Onset of blood lactate accumulation
• What is the lactate threshold?

  Point you pass into anaerobic system
• How does VO2 max relate to OBLA?

  Higher VO2 max equals higher OBLA
• At what percentage of VO2 max does an untrained person reach OBLA?

  50% of VO2 max
• At what percentage of VO2 max does a trained person reach OBLA?

  75% of VO2 max
• What is the resting level of lactate in mmol?

  2 mmol
• When is lactate considered OBLA?

  When blood lactate increases to 4 mmol
• What is the relationship between lactate threshold and OBLA?


  Lactate threshold often occurs alongside OBLA
• What are the factors affecting OBLA?

  • Exercise intensity
  • Respiratory exchange ratio
  • VO2 max
  • Rate of blood lactate removal
  • Muscle fiber types (e.g., ST fibers have more mitochondria)
• How do muscle fiber types affect OBLA?

  ST fibers have more mitochondria and less lactate
• What are the five factors of training impacting OBLA?

  1. Speed at which you fatigue
  2. Sudden increase in mmol
  3. When lactate threshold is reached
  4. Rate of lactate production
  5. Rate of lactate removal
• What is the fatigue speed for untrained individuals?

  17 km/h
• What is the fatigue speed for trained individuals?

  19 km/h
• What is the sudden increase in mmol for untrained individuals?

  9 mmol
• What is the sudden increase in mmol for trained individuals?

  10 mmol
• What is the lactate threshold rate for untrained individuals?

  2 mmol/min
• What is the lactate threshold rate for trained individuals?

  2 mmol/min
• What is the speed at which trained individuals reach lactate threshold?

  11.8 km/h
• How does training affect lactate production?

  • Training buffers lactate production
  • Increases efficiency of lactate removal
  • Enhances muscle fiber adaptation