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MSC PE Studies1A 1 Physical Education Studies 1A Functional Anatomy 3.

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Presentation on theme: "MSC PE Studies1A 1 Physical Education Studies 1A Functional Anatomy 3."— Presentation transcript:

1 MSC PE Studies1A 1 Physical Education Studies 1A Functional Anatomy 3

2 MSC PE Studies1A 2 Skeletal Muscle Muscles consist of a muscle belly with a fibrous tendon at either end which attaches to bone.

3 MSC PE Studies1A 3 Microstructure of Skeletal Muscle MuscleFibreMyofibrilsSarcomeres Protein Filaments MyosinActin

4 MSC PE Studies1A 4 Sliding Filament Theory As the actin filaments move to the centre, the sarcomere shortens. Sliding Filament Theory Sliding Filament Theory www.Peworld.org

5 MSC PE Studies1A 5 Types of Muscle Fibres Fast-Twitch (type ll) White Fibres Slow-Twitch (type l) Red Fibres RED OR SLOW TWITCH OR TYPE l FIBRES WHITE OR FAST TWITCH OR TYPE ll FIBRES Relatively slow contraction speed Rapid Contraction Mainly Aerobic Pathway Anaerobic ATP Production Contract repeatedly for continuous activity Fatigue More Quickly

6 MSC PE Studies1A 6 Relationship between selected activities and fibre type Patterns of muscle fibre distribution are most evident in highly trained athletes. Endurance athletes have predominantly slow-twitch fibres, while sprint athletes have mainly fast-twitch fibres activated.

7 MSC PE Studies1A 7 Activity Untrained Marathon Runners SwimmersSprintersCyclists Race Walkers 800m Runners Discus Throwers Orienteers Distance Runners CanoeistsWeightlifters FAST TWITCH SLOW TWITCH

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