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When the artery walls lose their elasticity, this is called arteriosclerosis. When this happens, the body has a tougher time circulating blood.
If it jiggles, it is losing elasticity. We all will go through that.
Emphysema.
i dont think it does but it might if its rusted
You only need to stretch it and move it backwards and forwards reasonably regularly. it will never lose its elasticity it just needs to be exercised.