Lactate - Friend or Foe

Question 1

Why should lactate be used instead of lactic acid?

Answer 1

• contributes to ongoing confusion regarding energy metabolism and models of muscular fatigue

Question 2

Is lactate responsible for muscle fatigue?

Answer 2

• NO

Question 3

What is lactate used for in the body?

Answer 3

Energy Substrate
- metabolism im multiple tissues

Question 4

Is Lactate confined to anaerobic conditions?

Answer 4

• NO

Question 5

What might limit the use of a Lactate threshold for individual athletes?

Answer 5

• fidelity of traditional lactate threshold measuring techniques

Question 6

What was found during moderate intensity exercise with lactate appearance and concentration in excess of endogenous production?

Answer 6

• Increase in lactate oxidation
• decrease in glucose oxidation

Question 7

What happened with exogenous lactate infusion?

Answer 7

Increased
- lactate into glucose
Decreased
- Glucose from glycogenolysis

Question 8

Discuss how lactate infusion effected fatigue in exercising men?

Answer 8

• Not associated with increase in sensation of fatigue

Question 9

What can lactate do for glucose and glycogen in times of increased energy demands?

Answer 9

Spare
- Blood Glucose
- Liver Glycogen