Energy System - Lactic acid
What causes pyruvic acid to become lactic acid
Insufficient oxygen
and the enzyme lactate-dyhydrogenase (LDH)
What enzyme breaks glucose into pyruvic acid
PFK (Phosphofructokinase
Disadvantages of the system
1.Lactic acid (Hydrogen Ions) inhibits muscular contraction
2.Onset of blood lactate accumulation (OBLA) causes fatigue
3.By product Lactic Acid reduces pH and prevents enzyme 4.function
Relatively low ATP yield compared to long recovery needed.
Advantages of the system
1.Energy can be produced quickly because there are few chemical reactions for activities up to 3 minutes
2.Oxygen is not required so there is no delay
3,Large amount of stored glycogen can provide more ATP than stores of PC
4.Produces 2 ATP per 1 molecule so more efficient than ATP-PC
How long does this system last and how long does it take for recovery
lasts upto 3 minutes
recovery - 2 or more hours