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the muscular system (Long term impacts of physical activity on the…
the muscular system
Long term impacts of physical activity on the muscular system
increase thickness of each muscle fibre (hypertrophy)
improving strength and contractile speed
increase number of muscles fibres
increasing contraction strength
increased availability of the fuel source required
PC glycogen triglycerides
slow twitch and FOG fibres develop bigger and more efficient capillary beds and increase mitochondrial density
Type of muscle function
Antagonists
The muscle that relaxes in response to the active muscle
Fixator
The muscle that helps to stabilise a joint
Agonist
The muscle responsible for the movement
Types of muscle contractions
concentric
When the muscle shortens to create the movement
eccentric
When the muscle lengthens to create the movement
isometric
The muscles do not move under force, its length does not change
The short term impacts of physical activity on the muscular system
Increased blood flow to your muscles
increasing the oxygen and energy available to your working muscles
increase muscle temperature
Enables a grater range of movement at a joint
reduces injury
Effects of a warm up and a cool down
Warm up
also helps to increase the temperature of the muscles helps to reduce the risk of injury
increases blood flow to the muscles improving oxygen glycogen and triglyceride levels
cool down
refreshes the levels of oxygen stored in the myoglobin
provides the muscles with the opportunity to replenish levels of glycogen and phosphate creatine