Extreme endurance activities such as ultramarathons can lead to both structural and molecular damage to red blood cells, according to a study published in the journal "Blood Red Cells & Iron" by the American Society of Hematology. The research highlights the risks associated with sustained participation in such extreme endurance events, where red blood cells, crucial for oxygen transport and waste removal in the body, are affected.

The findings indicate that the flexibility of red blood cells decreases after long-distance running, which can impair their ability to navigate narrow blood vessels and function effectively. Each minute, red blood cells complete a circulation journey, with 2 million new cells produced every second by the body, making their health vital, especially in endurance sports where oxygen delivery is critical. Understanding the impact of extreme running on these cells is essential for athletes and medical professionals alike.

As endurance sports grow in popularity, this research raises important questions regarding the long-term health implications for participants. While many are drawn to ultramarathons and similar events for the challenge, the potential for accelerated aging of blood cells and the possible health risks associated with such activities are crucial considerations for athletes aiming to maintain their performance and well-being over time.