Skeletal Muscular Contraction Flashcards
What are type IIa muscle fibres called?
Fast oxidative glycolytic
What are type I muscle fibres called?
Slow oxidative
What are muscle fibres made up of?
Myofibril
What are type IIx muscle fibres more suited to?
Explosive movements such as weightlifting and sprinting
What size are type IIa muscle fibres and what colour are they?
Medium-large size and red
What is Henneman’s size principle?
Type I muscle fibres are recruited first, then type IIa, then type IIx
Why is Henneman’s size principle good?
Less fatigue
More motor control
What oxygen capacity do fast glycolytic fibres have?
The lowest oxygen capacity
What contraction time do fast glycolytic fibres have?
the fastest contraction time
What type of energy is used only for fast glycolytic muscle fibres?
Glucose which will be stored as glycogen
What is the fatigue resistance of fast glycolytic fibres?
The lowest fatigue resistance
How do fast glycolytic fibres respire?
Anaerobically
What force and speed do fast glycolytic fibres have?
The highest force and speed
How big are fast glycolytic fibres and what colour are they?
The largest fibres and white
What are type IIx muscle fibres called?
Fast glycolytic
What exercises are best suited for fast oxidative glycolytic fibres?
Mile run
Swimming
Cycling
What type of respiration happens in Fast Oxidative Glycolytic fibres?
Aerobic and anaerobic can take over after a length of time, though this causes a build up of lactic acid and subsequent muscle fatigue
What is the main source of energy in fast oxidative glycolytic muscle fibres?
Oxygen and glucose
What is the contraction time of fast oxidative glycolytic muscle fibres?
Fast contraction time
What exercises are best suited to slow oxidative fibres?
Walking and jogging
What fatigue resistance do fast oxidative glycolytic fibres have?
Low/medium fatigue resistance
What is the force and speed of fast oxidative glycolytic fibres?
High force and speed
What type of respiration is used in slow oxidative muscle fibres?
Aerobic respiration
What is the main source of energy in slow oxidative muscle fibres?
Oxygen
What fatigue resistance do slow oxidative muscle fibres have?
The highest fatigue resistance
What order to muscle fibres recruit in?
Order of size
What type of muscle fibres are type I fibres?
Slow oxidative
What size and colour are slow oxidative fibres?
Small and red
What force and speed do type I muscle fibres have?
The slowest
