11 terms

PE AQA GCSE - movement terminology

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Terms in this set (...)

origin
the origin is the end of the muscle that is attached to the fixed bone
insertion
the insertion is the end of the muscle attached to the bone that moves
prime mover
the prime mover is the muscle that contracts to cause the movement
antagonist
the antagonist is the muscle that relaxes to allow movement to take place
agonist
is agonist is the muscle that contracts to cause the movement
flexion
flexion causes the angle at the joint to decrease
extension
extension causes the angle at the joint to increase
concentric
concentric is when the muscle shortens, contracts and bulges
eccentric
eccentric is when the muscle gradually lengthens and returns to its normal length and shape
Isotonic
isotonic can be both concentric and eccentric and is when the muscle fibres shorten and the bones move.
Isometric
isometic is when the muscle fibres contract yet stay the same length to keep the joint stable so bones do not move
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