EPOC

Question 1

Describe EPOC

Answer 1

• Recovery involving returning the body to its pre-exercise state
• When a performer finishes exercise, oxygen consumption still remains quite high compared to at rest
• This is because extra oxygen needs to be taken in and used to try and help the performer recover

Question 2

Explain the fast component

Answer 2

• Fast alactacid
• Replenishes ATP and PC stores
• Re-saturation of oxygen with myoglobin
• Requires 2-4 litres of oxygen and is completed within 2-3 minutes
• 50% of PC stores can be replenished within 30 seconds

Question 3

Explain the slow component

Answer 3

• Has four main functions which all aid recovery and all require a continued elevated rate of oxygen consumption
• Removal of lactic acid
• Maintaining breathing rate - need extra oxygen during recovery to feed the muscles, also allows myoglobin stores to be replenished in the muscles
• Glycogen replenishment
• Increased body temperature, increases rate of respiration, needs oxygen to fuel process which is supplied by slow component of EPOC

Question 4

Explain removal of lactic acid in the slow component

Answer 4

• lactate converted back to pyruvate, and oxygen is used to oxidise pyruvate into two acetyl groups. They combine with coA and join krebs cycle to replenish ATP
• Some lactate passed into bloodstream, some transported to liver to be converted into glucose, some removed from blood and excreted in sweat and urine
• Process of removing lactate can take more than an hour

Question 5

How can the process of glycogen replenishment be sped up?

Answer 5

• Eating carbs and protein with 30 mins of exercising or between 1 and 3 hours after exercising
• Chocolate milk good to drink after