Muscle Fibres Flashcards
1
Q
What are slow oxidative muscle fibres?
A
type 1 (slow twitch fibres)
low intensity exercise
produce most energy aerobically
2
Q
What are type IIa muscle fibres?
A
fast oxidative glycolytic
more resistant to fatigue
1500m
3
Q
What are type IIx (IIb) muscle fibres?
A
fatigue quicker than type a
used for highly explosive events e.g. 100m
4
Q
What are the motor neurone sizes and conduction capacity for each muscle fibre?
A
type I : small, slow
type II : large, fast
5
Q
What is the mitochondrial density and myoglobin content for each muscle fibre?
A
type I: high
type IIa: medium
type IIb: low
6
Q
What is the capillary density for each muscle fibre?
A
type I: high
type IIa: medium
type IIb: low
7
Q
What is the effect of training on fibres?
A
can cause hypertrophy
