ENERGY TRANSFER DURING EXERCISE

Question 1

what are the 3 energy systems?

Answer 1

1. immediate: ATP-PCr system (alactic and anaerobic)
2. short-term: lactic acid system (anaerobic)
3. long-term: aerobic system

Question 2

how long is ATP-PC used during maximal intensity?

Answer 2

less than 10 sec

Question 3

how long the lactic anaerobic system used at near maximal intensity?

Answer 3

15s-2m

Question 4

how long is the aerobic system used in sub-maximal intensity

Answer 4

more that 5 min

Question 5

can the lactate anaerobic system become more efficient with training?

Answer 5

yes

Question 6

what determines the rate of lactic acid production?

Answer 6

1. glycolytic activity

2. oxidative activity

Question 7

what are 5 specific factors in lactic acid production

Answer 7

1. muscle contration
2. enzyme activity
3. muscle fiber type
4. sympathetic nervous system
5. insufficient oxygen
6. decreased blood flow

Question 8

why is lactic acid a problem?

Answer 8

inhibits enzymatic activity due to lowered pH

Question 9

why is there a sensation of pain when you exercise?

Answer 9

lactic acid build up stimulates pain nerve endings

Question 10

what are the subdivisions of fast-twitch fibres?

Answer 10

type IIa

type IIx

Question 11

what are the 4 reasons why EPOC takes longer to return to baeline following strenuous exercise?

Answer 11

1. O2 deficit is smaller in moderate exercise
2. steady-rate O2 uptake is achieved vs in exhaustive exercise never attained
3. lactic acid accumulates in strenuous exercise
4. body temp increased