After a long trail race, some of your red blood cells may not bend the way they should. That matters because red blood cells have a tight job description.

Running extreme distances may strain more than just muscles and joints. New research suggests ultramarathons can alter red ...

Extreme endurance running damages red blood cells in ways that may affect their ability to function properly, according to a ...

Learn more about the impact ultramarathon running has on red blood cells and how it may do more harm than good for the body.

Scientists have discovered that red blood cells act as hidden glucose sponges in low-oxygen conditions, explaining why people ...

Extreme endurance training is often seen as a sign of strong physical fitness. However, new research indicates that very long-distance runs may have negative effects on the body.

Ultramarathons might push red blood cells past their limits—accelerating their aging in the process.

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 ...

Scientists have found that a special component in some people's blood provides them with natural protection against malaria. A recent study has demonstrated that a genetic variant named rs112233623-T ...

Scientists have long known that people living at high altitudes, where oxygen levels are low, have lower rates of diabetes ...

Mouse red blood cells infected with the parasite Babesia microti acquired the ability to move, offering new insight into host-pathogen interactions.