EPOC and O2 consumption

Question 1

EPOC (Excess Post exercise Oxygen Consumption) definition

Answer 1

Volume of oxygen consumed above normal following exercise (during recovery)

Question 2

VO2 Max definition

Answer 2

Maximal volume of oxygen that can be taken up and used by the muscles per minute

Question 3

What is the Maximal volume of oxygen that can be taken up and used by the muscles per minute

Answer 3

0.3-0.4 litres per minute

Question 4

What happens to the O2 consumption at the start of exercise

Answer 4

At the start of exercise we use more oxygen to provide ATP.
O2 consumption INCREASES

Question 5

What happens to the oxygen consumption as the intensity of exercise increases

Answer 5

As intensity increases so does oxygen consumption until we reach maximal O2 consumption (3-6 litres per min)

Question 6

What is the maximal O2 consumption (litres)

Answer 6

3 - 6 litres per min (L/min)

Question 7

Oxygen deficit

Answer 7

Occurs when there is not enough oxygen present at the start of exercise to supply enough ATP aerobically/ volume of oxygen needed to complete activity aerobically

Question 8

Oxygen Debt

Answer 8

• Recovery involves returning the body to its pre exercise state
• After performer completes exercise, O2 consumption remains quite high, due to extra oxygen needed to be taken in to help the performer recover
• EPOC

Question 9

What are the two components of EPOC

Answer 9

• Fast component- Alactacid
• Slow component- Lactacid

Question 10

What is Alactacid (Fast component of EPOC) used for

Answer 10

Extra oxygen taken is used to;
- Restore ATP
- Restore PC
- Re saturate myoglobin with oxygen

Question 11

Alactacid (Fast component of EPOC)

Answer 11

• 50% of PC stores in 30 seconds
• 3 litres of oxygen
• 2-3 mins

Question 12

What is Lactacid (Slow component of EPOC)

Answer 12

• Removal of lactic acid (one hour or longer).
• Pyruvate, converted to glycogen, converted to protein, removed in sweat and urine
• Maintenance of breathing and heart rates
• Helps all the processes repair quicker
• Increases in body temp remains high then respiratory rates remain high which will help the performer take in more oxygen

Question 13

Lactacid (slow) role in Glycogen replenishment

Answer 13

• Depends on the intensity
  Lactic acid is converted back
• Converted to Glycogen via Cori cycle to liver and muscles

Question 14

The Cori cycle

Answer 14

The process where lactic acid is transported in the blood to the liver where it is converted to blood glucose and glycogen