muscle fibre types Flashcards
1
Q
what types of muscle fibres are there
A
- slow twitch (type 1)
- fast twitch (type 2)
2
Q
what are the characteristics of slow twitch fibres
A
- make use of oxygen
- energy provided aerobically
- small amounts of power produced
- highly resistant to fatigue
- high levels of red blood cells, mitochondria, myoglobin
- relatively slow contraction speed
3
Q
what is the function of slow twitch fibres
A
for events that are aerobic and at a relatively low intenstiy so that fatigue is not a problem
e.g. marathon running
4
Q
what are the characteristics of fast twitch muscle fibres
A
- work anaerobically
- limited to no use of oxygen
- high amounts of power created
- low resistance to fatigue
- low levels of red blood cells, mitochondria, myoglobin
- quick contraction speed
5
Q
what is the function of fast twitch fibres
A
for fast, powerful events where fatigue happens quickly
e.g. 100m sprint, weightlifting
