Exercise Metabolism Flashcards
When first beginning ex’s ATP need is met by:
ATP-PC System, then anaerobic glycolysis
Oxygen Deficit
-difference between O2 uptake in first few minutes of ex’s and an equal time period after steady state has been reached
Which System Provides Energy at Rest?
-Aerobic Glycolysis
As steady state is approached:
the need for ATP is met through decr use of anaerobic glycolysis and an increase use of aerobic metabolism
Once steady state is reached:
ATP supply met via Aerobic metabolism
O2 deficit is _____ for trained people versus untrained
lower
2 Phases of EPOC
- rapid recovery
- Slow recovery
Rapid Recovery
O2 used mostly to replenish ATP-PC and O2 stores in muscle and blood
EPOC
- excess post-exercise O2 consumption
- increased metab (ventilation) after exercise stops
Glycogen Resynthesis Depends on
- type of ex’s that caused glycogen depletion
- amount of CHO consumed during recovery
(diet 55-60% carbs, recovery in 24 hours)
Glycogen resynthesis can take:
several days
Restoration of ATP-PT System
- rapid recovery phase
- energy comes from break down of CHO and fats to CO2 and H2O via krebs cycle
-some ATP used to replenish PC stores, some stored immediately
Glycogen Resynthesis:
Low intensity, long duration ex’s
eat more CHO during recovery to restore glycogen
Glycogen Resynthesis:
high intensity, short duration ex’s
- complete resynthesis does not require greater than normal intake of CHO
- recovery in 24 hours regardless of diet
- resynth most rapid in first few hours
Major removal of lactate:
-oxidated/converted to CO2 and H2O
