This muscle type is slow, it produces low forces and low speed of contraction. But it is high endurance so good for endurance athletes.
What does the Muscle 'type IIa' mean?
This muscle type is moderately fast, produces high forces and moderate speed of contraction. It has medium endurance. Good for athletes who run 400m.
What does the Muscle 'type IIx' mean?
This muscle type is very fast, produces very high forces and fast speed of contraction but doesn't have very good endurance. Good for anarobic athletes.
What is vascular shunting?
When you are exercising certain areas of your body require more oxygen than others. So blood is taken away from inactive areas and is directed to more active areas through vasodilation and vasoconstriction.