- same physical characteristics as Type
IIA, but strictly uses the glycolytic
anaerobic system
2. Fast twitch (type IIA)
- large diameter
- white in color
- less mitochondria
- uses both anaerobic and aerobic
energy transfer
1. Slow twitch (type I)
- smaller in diameter
- reddish color
- use aerobic resp. for ATP supply
- contain more mitochondria
-fire slowly, but take long to
fatigue.
a) Types of muscle contraction
3. Isokinetic
- performed with a constant
speed throughout the movement.
(muscle changes length, constant
speed)
2.Isometric
- static contraction (no change in
the length)
1. Isotonic
-contraction that causes the
muscles to shorten to overcome
resistance involved 2 phases: Concentric (muscle shortens) and Eccentric (muscle lengthens)
