Energy Systems
Adaptations to Training
Energy systems: increased aerobic
and anaerobic enzymes; increased
use of fats as an energy source
Energy System Adaptations to
Anaerobic Training
•ATP – CP
–Will increase stores of ATP & CP
•Anaerobic Glycolysis (Lactic Acid
System)
– in levels of glycolytic enzymes
–Less Lactic Acid produced, more
efficient Cori cycle (converting lactic
acid in the liver back to glucose to
use)
–Increased buffering capacity (acidbase balance) more able to
tolerate lactic acid for longer!
–More energy can be produced
through these systems
Adaptation to Aerobic
Training
-↑ the availability of carbohydrate and fats as substrate to meet cellular
needs for ATP resynthesis.
-↑ capillary density
-↑ myoglobin content (increases extract of O2 to the muscle cells)
-↑ activity of oxidative enzymes (aerobic pathways)
-↑ oxidative capacity linked to ↑ numbers of mitochondria
-Therefore O2 ↑ utilization
Adaptation to Aerobic Training
Increased capacity to oxidize
Fats shifts the energy source
from glucose to fat (to spare
glucose)
Decreased utilisation of the
anaerobic glycolysis (LA)
system
↓ lactate concentration ↑
clearance of lactate during
exercise