Why does increased oxidative stress accelerate muscle sarcopenia, rather than other aging effects, in long-distance runners?

💡 Explanation

Oxidative stress preferentially affects highly metabolic tissues like muscle. Mitochondrial dysfunction inhibits protein synthesis in muscle cells, because reactive oxygen species damage mitochondrial DNA and respiratory chain components, therefore accelerating sarcopenia, rather than bone density loss or ligament degradation, which have different primary mechanisms.

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