Running extreme distances may strain more than just muscles and joints. New research suggests ultramarathons can alter red blood cells in ways that make them less flexible and more prone to breakdown, ...
By Dennis Thompson HealthDay ReporterTHURSDAY, Feb. 19, 2026 (HealthDay News) — Ultra-marathon runners must be incredibly fit to endure races that can extend more than 100 miles, but their bodies pay ...
Red blood cells carry oxygen from the lungs to every other organ, and blood-forming stem cells must make about 200 billion new red blood cells each day to keep the oxygen flowing. For many years, ...
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