[Fiber Type] Activity Used for [Type II a fibers] Long-term anaerobic [Type II x fibers] Short-term anaerobic [Type II b fibers] Short-term anaerobic [Type I fibers] 
Aerobic
S l o w
S m a l l
H i g h
A e r o b i c
H o u r s
L o w
T r i g l y c e r i d e s