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anon answered on 3 Jul 2012:
Hi Ben,
muscle tissues are unable to repair themselves fully. This is because no stem cells are available to generate more muscle tissue to replace that which has been lost. Instead the body fills the gap with scar tissue which is strong but unable to contract. Over the long term the remaining muscle fibres can pick up the slack by getting bigger. This is known as muscular hypertrophy. The muscle itself can therefore perform normally over time, even though complete repair has not taken place.
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