Slow twitch fibres (type 1)
Fibres with a slower contraction speed
High mitochondria / myoglobin
Fatigue resistent
Uses aerobic energy
Fast oxidative glycolytic (type 2a)
Fibres that have a moderate force
Moderate fatigue resistent
Both aerobic / anaerobic
Fast glycolytic (type 2x)
Fibres that have a very fast contraction speed
Low mitochondria / myoglobin
Fatigue quickly
Uses anaerobic energy