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Running Ultramarathons May Harm Red Blood Cells and Speed Up Aging

Published on June 24, 2026, 10:52 p.m.
Running Ultramarathons May Harm Red Blood Cells and Speed Up Aging

Topic: Health

Researchers found that running extreme distances can damage red blood cells, making them less flexible. This may lead to anemia and accelerate aging.

Red blood cells are crucial for carrying oxygen throughout our bodies. A new study shows that running ultramarathons can harm these cells in ways that may affect their function. The researchers analyzed the blood samples of 23 athletes before and after they completed two demanding races: one 40-kilometer long and another 171-kilometer long. They found signs of injury to the red blood cells, which was more pronounced after the longer race.

The study's lead author, Travis Nemkov, explained that participating in such events can cause general inflammation in the body and damage red blood cells. He emphasized that we don't yet know how long this damage lasts or what it means for our long-term health.

The researchers also created a detailed molecular profile showing how endurance races alter red blood cells. They found that after prolonged races, red blood cells become less flexible. This reduced flexibility may limit their efficiency in delivering oxygen and removing waste products.

The study's findings add to the growing evidence that very intense exercise may sometimes strain our bodies rather than strengthen them.

Why It Matters

As Indian students prepare for competitive exams or participate in sports, it's essential to understand how extreme physical activity affects their bodies. This study highlights the importance of balancing exercise with rest and recovery to avoid potential harm to red blood cells.

Key Facts

  • Ultramarathon running can damage red blood cells, making them less flexible
  • The longer the race, the more pronounced the damage is
  • Red blood cell injury may lead to anemia and accelerate aging

Key Terms

Inflammation
A natural response of the body's immune system to tissue damage or infection

Implications

As Indian students prepare for competitive exams or participate in sports, it's essential to understand how extreme physical activity affects their bodies. This study highlights the importance of balancing exercise with rest and recovery to avoid potential harm to red blood cells.


Source: https://www.sciencedaily.com/releases/2026/02/260221060946.htm

Journal Reference:

  1. Travis Nemkov, Emeric Stauffer, Francesca Cendali, Daniel Stephenson, Elie Nader, Mélanie Robert, Sarah Skinner, Monika Dzieciatkowska, Kirk C. Hansen, Paul Robach, Guillaume Y Millet, Philippe Connes, Angelo D’Alessandro. Long-Distance Trail Running Induces Inflammatory-Associated Protein, Lipid, and Purine Oxidation in Red Blood Cells. Blood Red Cells, 2026; 100055 DOI: 10.1016/j.brci.2026.100055

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