TFI

Question 1

The role of atrioventricular node in cardiac conduction system?

Answer 1

• receives impulse from SA node.
• delays impulse allowing atria to fully contract
• sends impulse through bundle of HIS then to purkinje fibres

Question 2

How does body adapt to an increased maximum a-vo2 diff?

Answer 2

• increased oxygen content due to rbc
• increased gas exchange due to capillarisation which means larger surface area
• increased gas exchange due to more mitochondria so more oxygen used in muscle and less returned to venous blood

Question 3

HITT training definition

Answer 3

• alternating periods of short intense anaerobic exercise with less intense recovery periods.
• improves anaerobic power

Question 4

HITT training advantages

Answer 4

• burns lots of calories
• increased muscular endurance
• can be completed individually or as a team
• avoids fatigue due to rest periods

Question 5

HITT training disadvantages

Answer 5

• Longer recovery period from HIIT training so sessions would have to be carefully planned around
  games/other training sessions to avoid fatigue/over-training.
• difficult to make sport specific
• aerobic lacking so may be more beneficial to do fartlek training instead
• injury prone
• weight training and continuous training is better for strength

Question 6

Slow twitch muscle fibres features

Answer 6

• small size of motor neuron
• high number of mitochondria
• high capillary density
• high myoglobin

Question 7

Fast glycolytic muscle fibres features

Answer 7

• large size of motor neuron
• low number of mitochondria
• low capillary density
• low myoglobin content

Question 8

Long distance/endurance muscle fibre

Answer 8

Slow twitch muscle fibres

Question 9

Short distance/endurance muscle fibre

Answer 9

Fast glycolytic muscle fibre

Question 10

Advantage of slow twitch muscle fibres

Answer 10

• high Vo2 max and increased lactate threshold so can run at fast speed without fatigue
• high aerobic capacity
• extra oxygen can be converted into energy quicker due to mitochondria
• increase vo2 max and aerobic power

Question 11

Advantages of using fast glycolytic muscle fibres

Answer 11

• high anaerobic capacity
• large motor neurone means great impulse to more muscle fibres so a stronger/faster contraction
• High ATP levels means that ATP can be broken down more quickly to produce the energy required for muscle contractions
• Increase in power
• Due to its short duration, aerobic power is not required so muscles do not need these functions as fatiguability is not a consideration