EPOC

Question 1

define EPOC

Answer 1

• excess post-exercise oxygen consumption
• the volume of oxygen consumed post exercise to return the body back to a pre-exercise state

Question 2

what happens as performance/exercise ends?

Answer 2

• myoglobin has lost its stores of oxygen, ATP, and PC
• glycogen stores may be depleted
• lactic acid levels may be high

Question 3

what is the aim of EPOC?

Answer 3

to return the body to pre-exercise state where all fuels are complete and the blood and muscle tissue are free of any by-products

Question 4

what is an oxygen deficit?

Answer 4

• the volume of oxygen that would be required to complete an activity entirely aerobically
• EPOC needs to be large enough to counteract this

Question 5

fast alactacid recovery

Answer 5

• the initial fast stage of EPOC
• oxygen consumed within three minutes resaturates haemoglobin and myoglobin stores and provides the energy for ATP and PC resynthesis

Question 6

how much oxygen is used in the fast alactacid component

Answer 6

1-4 litres

Question 7

replenishment of blood and muscle oxygen

Answer 7

• oxygen resaturates the blood stream associating with haemoglobin
• restored oxy-myoglobin link in muscle cells

Question 8

re-synthesis of ATP and PC stores

Answer 8

• aerobic energy production continues providing energy
• restoration of muscle phosphagen to restore high-energy bonds in ADP and creatine
• energy + P + ADP - ATP
• energy + P + C - PC

Question 9

slow lactacid component of recovery

Answer 9

• after fast stage, more complex and time consuming to return the body to pre-exercise state
• provision of energy to maintain ventilation, circulation, and body temperature
• removal of lactic acid and replenishment of glycogen

Question 10

how much oxygen is consumed during the slow lactacid stage?

Answer 10

5-8 litres

Question 11

ventilation and circulation

Answer 11

• elevated f and HR but gradually decrease
• maximises the delivery of oxygen to remove by-products
• 1% - 2% of EPOC

Question 12

body temperature

Answer 12

• remains elevated increasing the metabolic rate
• accounts for 60% - 70% of EPOC

Question 13

removal of lactic acid and replenishment of glycogen

Answer 13

• 50% - 75% of pyruvic acid oxidised in mitochondria producing CO2, H20, and energy
• 10% - 25% glu/glyconeogenisis