A recent study delves into the science, but doctors say there’s more to it. Scientists link high-intensity, long-distance ...

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, ...

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

A study shows ultramarathon running induces oxidative stress and structural damage in red blood cells. Multiomics analyses revealed protein oxidation, copper accumulation, and reduced cell flexibility ...

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