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The authors frame it as adaptation to repeated oxidative stress.\nexposure: Habitual ice bathing\nevidence_span: {\"source_cache\": \"artifacts/cold-research/10396606.abstract.txt\", \"locator\": \"Indexed abstract; zero-based, end-exclusive Unicode character offsets\", \"file_sha256\": \"fdd2deec82fad8f9e148848c443d5b173ec42c0e07d9045c59773f7109883a7b\", \"start_char\": 0, \"end_char\": 1139, \"text_sha256\": \"fdd2deec82fad8f9e148848c443d5b173ec42c0e07d9045c59773f7109883a7b\"}\n[cold-p10396606] Improved antioxidative protection in winter swimmers. (1999). https://pubmed.ncbi.nlm.nih.gov/10396606/ DOI: 10.1093/qjmed/92.4.193","model_system":"Winter swimmers compared with people who had never taken part, sampled for erythrocyte and plasma antioxidants","directness":"author_interpretation","verification_status":"source_derived_draft","notes":"Exact curation-document quotation, not publisher quotation. 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