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  "path": "/running-ultra-marathons-may-harm-your-blood-cells-study-warns",
  "publishedAt": "2026-02-25T12:00:00.000Z",
  "site": "https://www.sciencealert.com",
  "textContent": "Pushing the body towards ultra-marathon distances can cause red blood cells to be less flexible,...",
  "title": "Running Ultra-Marathons May Harm Your Blood Cells, Study Warns"
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