MOVEMENT ANALYSIS: muscle fibres Flashcards
three muscle types
-cardiac
-smooth
-skeletal
cardiac muscles
in charge of the heart
involuntary (unconscious
smooth muscles
found in internal organs and blood vessels
involuntary (unconscious)
skeletal muscles
found attached to our skeleton
voluntary (conscious)
what are types 1 fibres
slow oxidation fibres/ slow twitch fibres
what are type 1 fibres used in
walking
jogging
aerobics
equation for type 1 fibres
o²= energy
are type 1 fibres aerobic or anaerobic?
aerobic
structure of type 1 fibres
-high number of mitochondria
- high number of capillaries within each muscles fibres
-small cross-sectional area
-high myoglobin
function of type 1 A
-produces high levels of ATP aerobically
-provides good blood and oxygen supply to muscle fibres which results in high resistance
-low speed and force of contraction ideal for endurance activities
-transports oxygen to the mitochondria meaning that fibers can contract repeatedly
what are type II B fibres
known as fast glycolic fibres/ Fast twitch fibres
what are Type II B fibres used in
weight lifting, sprinting etc.
equation for type II B fibres
glucose=energy
structure of type II fibres
-white in colour
-high levels of the fuel glycogen
-large cross-sectional area
-high levels of phospocreatine
Function of Type II B fibres
-low resistance to fatigue due to low blood and oxygen supply
-high anaerobic capacity
-fibres have high speed and high force contraction ideal for power and explosive contractions
-works anaerobically
