A key tension within this evidence base lies in the consistency of clinical translation. By contrast, the preclinical mouse model presents a coherent and statistically significant story of cold-induced anti-inflammation via CXCL13. The human observational cohort, however, reports a bifurcated set of results, with some endpoints meeting significance thresholds and others showing null or trend-level effects. This disagreement highlights the challenge of translating a potent, isolated mechanistic pathway observed in animal models into a clinically measurable outcome in humans, particularly within a complex, multi-component behavioral intervention. The boundary conditions for a clinical anti-inflammatory effect of cold exposure remain to be established.

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