|What are the two main types of striated muscle fibres?
|Fast-twitch and slow twitch; which are classified on the basis of speed and contraction.
|What are slow twitch fibres?
|Type l fibres are best suited for aerobic endurance type activities, long intensity-long duration as they have a slower contraction time.
|What are fast twitch fibres?
|Type ll fibres are suited to high intensity, short duration anaerobic exercise. There are two types of type ll muscle fibres: -Type lla/ fast twitch oxidative glycolytic fibres are high intensity fibres which also possess endurance characteristics, suited for middle distance athletes or game players. (tennis player/ 1500m) -Type llb/ fast twitch glycolytic fibres are suited for maximal intensity but short duration activities (100m sprint/shot-put)
|What are the responses of the muscular-skeletal responses to exercise? (3)
|-fibre recruitment -force production -metabolism
|What are the skeletal responses to exercise?
|Greater flexibility occurs at joints, increased heat production causes increased production of synovial fluid which reduces friction at joints.
|What are muscular adaptations to exercise?
|-dependant on the type of training, the muscle fibres will change. -with strength training muscle fibres can increase size by 40-45% -muscles develop a greater contractile force -connective tissue around the muscle will also experience an increase in strength, in turn increasing stability of joints.
|What are the skeletal adaptations to exercise?
|-increased stress on the bone encourages increased strength developing along the direction of the stress in the bone. -greater bone density, as research suggests that the act of a muscle pulling upon a bone creates calcium deposits at the point of the stress. -weight bearing activities encourage a strengthening and thickening of the hyaline cartilage (cushions the joint).