You may be familiar with the story of Philippides, the famous Greek runner who ran the first marathon and then died after completing his run. Based on what you know of aerobic respiration and fermentation, why might Philippides have died?

Question

Quizplus · Accepted Answer

During intense exercise, an athlete's body may switch from aerobic respiration to fermentation, where glucose is broken down into lactic acid instead of carbon dioxide and water. This can cause the accumulation of lactic acid in the muscles and bloodstream, leading to a decrease in pH and more acidic blood. This condition, called acidosis, can be dangerous and even deadly if left unchecked. Therefore, it is likely that Philippides died due to the accumulation of too much lactic acid in his body, causing his blood to become more acidic.

You May Be Familiar with the Story of Philippides, the Famous