muscle fibre types

Question 1

what are the different fibre types of muscle fibre

Answer 1

• slow oxidative (SO or type 1)
• fast oxidative glycolytic (FOG or type 2a)
• fast glycolytic (FG or type 2b)

Question 2

how do each of the muscle fibre types appear

Answer 2

• Slow oxidative muscle SO/type 1 - dark pink
• Fast glycolytic oxidative FOG/type 2a - light pink
• Fast glycolytic muscle FG/ type 2b - pale

Question 3

what are the structural characteristics of slow oxidative fibres

Answer 3

• small neuron size
• few fibres per neuron
• high capillary density
• high mitochondria density
• high myoglobin content
• low phosphocreatine store

Question 4

what are the functional characteristics of slow oxidative fibres

Answer 4

• slow speed of contraction
• low force of contraction
• high fatigue resistance
• high aerobic capacity
• low anaerobic capacity

Question 5

what are sporting applications for slow oxidative fibres

Answer 5

• Endurance athletes
• Marathon
• Triathlon
• Cross - country skiing

Question 6

what are the structural characteristics for fast oxidative glycolytic fibres

Answer 6

• large neuron size
• many fibres per neuron
• high capillary density
• moderate mitochondria density
• moderate myoglobin content
• high phosphocreatine store

Question 7

what are the functional characteristics for fast oxidative glycolytic fibres

Answer 7

• fast speed of contraction
• high force of contraction
• moderate fatigue resistance
• moderate aerobic capacity
• moderate anaerobic capacity

Question 8

what are sporting applications for fast oxidative glycolytic fibres

Answer 8

• High intensity athletes
• 800m - 1500m
• 200m freestyle

Question 9

what are the structural characteristics for fast glycolytic fibres

Answer 9

• large neuron size
• many fibres per neuron
• low capillary density
• low mitochondria density
• low myoglobin content
• high phosphocreatine store

Question 10

what are the functional characteristics for fast glycolytic fibres

Answer 10

• fast speed of contraction
• high force of contraction
• low fatigue resistance
• low aerobic capacity
• high anaerobic capacity

Question 11

what are sporting applications for fast glycolytic fibres

Answer 11

• Explosive athletes
• 60m - 100m sprint
• Javelin
• long jump

Question 12

what are the features of small motor neurons

Answer 12

• Stimulates few small muscle fibres
• Small + slow amount of force
• Fatigue resistant

Question 13

what are the features of large motor neurons

Answer 13

• Stimulates many large muscle fibres
• Large amounts of rapid forces
• Fatigue quickly