Which of the following best describes decreased blood viscosity as a effect of endurance training?

Decreased blood viscosity as an effect of endurance training indeed enhances oxygen transport. When blood viscosity decreases, the blood becomes less thick and flows more freely through the blood vessels. This improved flow allows for more efficient delivery of oxygen to the working muscles and tissues during physical activity. Enhanced oxygen transport is particularly vital during endurance exercises, as the muscles rely heavily on oxygen to sustain prolonged efforts.

This improvement in blood flow and oxygen delivery can lead to better overall performance, endurance, and recovery in individuals who engage in regular aerobic training. It also contributes to the body’s ability to clear metabolic byproducts, such as carbon dioxide and lactic acid, which can accumulate during exercise and lead to fatigue. Thus, the decrease in blood viscosity plays a crucial role in enhancing athletic performance and maintaining energy levels during extended physical activities.