concentric and eccentric tips??!

[non_serviam]

im looking for a book that explains with images eccentric and concentric contraction..to understand exactly the moves!! or anyone pls help me!!

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[Swiss Ball]

The way I think about it is:

If the action is a deceleration (eg catching a ball in front of you and slowing it down by bringing your arms back towards you, or slowing your leg down after kicking a football) then it is eccentric.

If the action is controlled against gravity then it is eccentric (eg sitting down on a chair is an eccentric contraction of the knee extensors, or starting stood on tip toes and lowering down slowly to a flat foot will be eccentric contraction of ankle plantarflexors).

Anything else is concentric. If you are exerting a big force eg kicking a ball then it's concentric.

[pudding_bowl]

it can even be made much simpler than that...
concentric = muscle shortens
eccentric = muscle lengthens
isometric = muscle doesn't move

It refers to the muscle doing the action however. there is never 1 muscle firing - so throughout a movement there will be both concentric and eccetric and isometric contractions going on to produce or control a movement.

[non_serviam]

thank u !! that helped me a lot!

[DR.YAHYA]

u can see this & it's possible to understand this picture

[Theodoravoon]

u can see this & it's possible to understand this picture

It's a clearly stated picture, it helps a lot, thanks!