PHED 3 Exercise Physiology EPOC A2 PE PHED 3 Exercise Physiology EPOC

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

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

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

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

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

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

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