4.1 Energy

Question 1

What are the 3 main nutrients in energy?

Answer 1

Carbs, Fats, Protein

Question 2

what are the roles of carbs, fats and proteins in exercise?

Answer 2

Carbs: fuels exercise - moderate to high intensity
Fat - Fuels low intensity for extended period
Proteins - used to repair the body tissue, rarely used to power muscle

Question 3

what is ATP and where is it produced?

Answer 3

Adenosine Tri-phosphate, it is created in the mitochondria and is fuelled by fats and carbs

Question 4

what it is the role of ATP?

Answer 4

ATP captures energy from food molecule breakdown and releases it to fuel actions

Question 5

What is the difference between aerobic and anaerobic?

Answer 5

aerobic - oxygen present for synthesising

anaerobic - oxygen no present for re synthesising

Question 6

Discuss the function and characteristics of the ATP-PC energy system? (intensity, duration, by-products)

Answer 6

• No o present
• 10-15 sec
• high intensitty
• PC stored in muscles
• Restored in 2-3 minutes

Question 7

Discuss the function and characteristics of the lactic acid energy system? (intensity, duration, by-products)

Answer 7

• Synthesizers ATP without O
• Used after PC is depleted
• 60-90 secs
• Energy from glucose/glycogen (glucose - singularity, glycogen - multiple)
• Breaking down glycogen/glucose is called glycogen
  Moderate to high intensity

Question 8

Discuss the function and characteristics of the aerobic energy system? (intensity, duration, by-products)

Answer 8

• Resynthesises with O
• Low to moderate intensity
• Uses a variety of energy sources
• Carbs, fat, protein (in order of preference)
• May breakdown muscle if these energy sources are depleted (e.g. marathon runner)
• By-products: heat, CO2, H20