Narrative review describes bidirectional relationship between sarcopenia and pain in older adults

This narrative review synthesizes existing evidence on the relationship between sarcopenia and pain in older adults and aging populations. The review does not report specific study designs, sample sizes, or original data, but describes a conceptual framework based on the available literature.

The core finding is that sarcopenia and pain are described as closely interconnected in a bidirectional relationship. Pain is posited to reduce physical activity, accelerate muscle wasting, and foster functional decline. Conversely, sarcopenia is suggested to increase vulnerability to painful syndromes such as osteoarthritis, fragility fractures, and low back pain. The review proposes this relationship is amplified by chronic low-grade inflammation ('inflammaging'), mitochondrial dysfunction, and central sensitization.

No safety, tolerability, or adverse event data are reported, as the review focuses on mechanistic and conceptual links. A key limitation is the narrative format itself, which precludes quantitative synthesis, meta-analysis, or reporting of effect sizes, confidence intervals, or p-values. The authors note that current diagnostic frameworks for sarcopenia fail to integrate pain dimensions.

Regarding practice relevance, the authors advocate for novel screening approaches that combine anthropometric measures with validated pain assessments to improve case finding. They suggest integrated clinical strategies that simultaneously target muscle health and pain management may be beneficial. However, these recommendations are based on a qualitative synthesis of emerging evidence, and robust epidemiological data are mentioned but not quantified in this review.