Ultramarathons Linked to Changes in Red Blood Cells

By Neev News Desk|Feb 21, 2026, 18:29 ISTUpdated: Feb 22, 2026, 07:12 IST1 min read
Ultramarathons Linked to Changes in Red Blood Cells

Recent research indicates that ultramarathons may negatively affect red blood cells, making them less flexible and more susceptible to breakdown. This could impact oxygen delivery in the body.

Running long distances can put stress on various parts of the body, including muscles and joints. However, new findings suggest that ultramarathons may also have an effect on red blood cells. According to a report by Science Daily, these extreme endurance events can alter the properties of red blood cells, reducing their flexibility and increasing their likelihood of breakdown. This change could interfere with the cells' ability to transport oxygen throughout the body.

Research Findings

The study revealed that ultramarathon runners experience mechanical stress due to intense blood flow during their races. Additionally, there are indications of molecular damage associated with inflammation and oxidative stress. These factors combined may contribute to the observed changes in red blood cells, raising concerns about the long-term effects of participating in such extreme endurance activities.

As ultramarathons continue to gain popularity, understanding their impact on health becomes increasingly important. The research highlights the need for athletes to be aware of potential risks associated with extreme physical exertion. While ultramarathons can be a test of endurance and determination, the implications for red blood cell function warrant further investigation to ensure the safety and well-being of participants.