If an elderly patient experiences increased muscle fatigue and reduced bone density due to diminished antioxidant capacity, which mechanism primarily accelerates this decline?

💡 Explanation

Oxidative stress promotes muscle protein breakdown and impairs osteoblast function due to reactive oxygen species damage; this shifts the balance toward catabolism in muscle and bone because it overwhelms repair mechanisms. Therefore, oxidative stress induced catabolism accelerates decline, rather than satellite cell activation or mitochondrial biogenesis alone being primary.

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