Muscle fibre types Flashcards
What is the name of the type 1 muscle fibre
Slow oxidative
What is the name of the type 2a muscle fibre
Fast oxidative glycolytic
What is the name of the type 2b muscle fibre
Fast glycolytic
What colours are type 1/2a/2b muscle fibres
Red/red to pink/white(pale)
What are the sizes of type 1/2a/2b muscle fibre types
Small/intermediate/large
What are the no. of mitochondria in type 1/2a/2b muscle fibres
Many/many/few
What are the no. of capillaries
Many/many/few
What is the myoglobin concentration of type 1/2a/2b muscle fibres
High/high/low
What are the glycogen stores for type 1/2a/2b muscle fibres
Low/intermediate/high
What is the contractile speed for type 1/2a/2b muscle fibres
Slow/fast/fast
What is the contractile strength for type 1/2a/2b muscle fibres
Low/intermediate/high
What is the fatigue resistance for type 1/2a/2b muscle fibres
High/moderate/low
What is the aerobic capacity for type 1/2a/2b muscle fibres
High/moderate/low
What is the anaerobic capacity for type 1/2a/2b muscle fibres
Low/high/high
Example of type 1/2a/2b muscle fibres (gastrocnemius)
Gastrocnemius of a marathon runner/gastrocnemius of 1500m runner/gastrocnemius of 110m hurdler
Best suited activities for type 1 muscle fibres
Endurance activities
Best suited activities for type 2a muscle fibres
Activities involving walking, running and sprinting
Best suited activities for type 2b muscle fibres
Speed/power type activities
What is the role of mitochondria
Provides large amounts of energy using O2
What is the role of capillaries
Provides blood to muscles, site of gas exchange
What is myoglobin
O2 carrier/storage in muscle fibres (strong attraction to CO2)
What influences colour of muscle fibre types
More myoglobin = more O2 present in cell = more red
How long does it take for type 1 muscle fibres to be recruited
90 seconds
How often can type 1 muscle fibres be used
Daily as fibre damage is minimal - recover quickly
