Ultra-Running May Accelerate Aging
New research highlights that while running is excellent exercise, excessive endurance training may accelerate aging complications. Ultra-endurance efforts can stress the body, potentially increasing risks like joint wear, immune suppression, and other age-related issues. The research emphasizes that balance and recovery are key, especially with advancing age.
- A recent study published in the American Society of Hematology's journal *Blood Red Cells & Iron* examined runners in 40-kilometer and 171-kilometer alpine races to understand the cellular impact of extreme endurance. - Researchers found that ultra-endurance running can cause red blood cells to become less flexible, which may hinder their ability to deliver oxygen and remove waste from the body efficiently. - The study identified two primary causes for this cell damage: mechanical stress from the physical pounding of running and molecular changes linked to inflammation and oxidative stress. - According to the study's lead author, Dr. Travis Nemkov, the damage to red blood cells begins to take significant hold at distances somewhere between a standard marathon and an ultramarathon. - The accelerated aging of red blood cells observed in the runners showed similar damage patterns to those seen in blood stored for transfusions. - Beyond cellular damage, ultra-marathons are known to cause a significant inflammatory response, with elevated levels of C-reactive protein and interleukin-6 compared to shorter races. - Hormonal shifts are also common during ultra-endurance events, often including an increase in the stress hormone cortisol and a decrease in testosterone. - While generally temporary, ultra-marathons can also lead to a reduction in renal function and increases in cardiac biomarkers that indicate stress on the heart.
