1.1 Anatomy - Respiratory system

Question 1

Explain the term ‘excess post-exercise oxygen consumption’ (EPOC)

Answer 1

(additional) volume of oxygen needed to return body to pre-exercise
state
* alactacid and lactacid components
* aerobic energy production during recovery
* oxygen used to break down of lactic acid
* replenishment of myoglobin
* (aerobic energy used to) resynthesise ATP / replenish PC

Question 2

Explain why a knowledge of Excess Post exercise Oxygen Consumption (EPOC) is beneficial
to an 800 metre runner when planning a training session.

Answer 2

• EPOC restores PC/phosphagen/ATP/oxy-myoglobin and removes lactic acid
• Warm up to reduce oxygen deficit
• Cool down to speed up removal of lactic acid
• Include breaks to allow 2-3mins (full) PC restoration
• Use of cooling aids to speed up recovery

Question 3

what are the two stages of epoc

Answer 3

alactacid - fast
lactacid - slow

Question 4

Why does lactic acid accumulation occur quickly during high intensity anaerobic activity?

Answer 4

there is a large oxygen deficit as oxygen demand is not met

Question 5

describe the alactacid component of EPOC

Answer 5

re-synthesis of ATP and PC stores
replenish myoglobin stores
30s for 50%
3 mins for 100%

Question 6

describe the lactacid component of EPOC

Answer 6

5 to 8 litres of oxygen to return body to pre-exercise state
removal of lactic acid and replenishment of glycogen
1 hour