So you think you know … MUSCLES?.

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Presentation transcript:

So you think you know … MUSCLES?

Things to know… Major muscles for movement – location, origin & insertion [Page 140-142] Antagonist vs Agonist [Page 143] Joint movements [135-136] Types of Contractions [Page 144]

Key words Origin and insertion of muscles The origin is the end of a muscle which is attached to a fixed bone. The insertion is the end of the muscle that is attached to the bone which moves.

Joint Movements & Sport Contexts

Antagonist vs Agonist http://www.youtube.com/watchv=rAz2Pam73e0 Know your definitions Agonist: The agonist or prime mover is the muscle causing the major action. Antagonist: An antagonist is a muscle that must relax and lengthen to allow the agonist to contract, thus helping to control an action. The agonist works as a pair with the antagonist muscle. The two roles are interchangeable depending on the direction of the movement. Fixator/Stabiliser: stabiliser or fixator muscle act at a joint to stabilise giving the muscles a fixed base. Synergist: A muscle which aids the action of a prime mover (a muscle which has the main responsibility for a particular movement). The synergist may produce the same movement as the prime mover, or it may stabilize the joints across which the prime mover acts, preventing undesirable movements

For the following exercises Name the: Agonist Antagonist Stabiliser

Barbell Curl

Leg Extension

Types of Contractions Concentric – during this contraction, the muscle shortens, causing the movement at the joint Eccentric – contraction occurs while the muscle lengthens under tension Isometric- contraction occurs when the muscle fibres are activated and develop force, but the muscle length does not change; that is, movement does not occur.

How to study PE http://www.youtube.com/watch?v=fmnwMQCht-8 http://quizlet.com/11921506/muscular-system-flash-cards/