1. PHED 3 Exercise Physiology EPOC
A2 PE
PHED 3
Exercise Physiology
EPOC

2. EPOC Excess Post-exercise Oxygen Consumption
Represents the extra volume of O2 consumed following exercise that enables the body to fully recover

3. EPOC
Why?......
Beginning of exercise not enough O2 to use the aerobic system for energy, so work anaerobically – an O2 deficit occurs
Takes 2-3mins for the aerobic system to ‘kick in’ even during low intensity

4. EPOC
Exercise
Recovery
VO2 (L/min)
O2 deficit
O2 Debt

5. EPOC Fast Recovery O2 Deficit Slow Recovery VO2 (L/min) Recovery
Exercise

6. 2 stages of EPOC Stage 1: Fast recovery (alactacid) 2-3 mins
Stage 2: Slow recovery (lactacid)
~ 2 hours

7. Fast Recovery (Alactacid)
2-3 mins
Consumed O2 helps to:
1. Resaturate myoglobin
2. Provide aerobic energy to resythesise ATP & PC stores

8. Slow Recovery (Lactacid)
2-3 hrs
O2 consumed helps to:
1. Remove Lactic Acid
2. Maintain high HR and breathing rate
3. Replenish muscle glycogen stores
(dependent on exercise & CHO intake)
4. Regulate body temperature