Final answer:
Blood volume increases with chronic exercise due to the release of hormones like EPO and improved blood flow. This helps deliver more oxygen and nutrients to the muscles during exercise.
Step-by-step explanation:
During chronic exercise, blood volume increases. This is because exercise stimulates the release of hormones, such as erythropoietin (EPO), which promotes the production of red blood cells and increases blood volume. In addition, exercise improves blood flow and circulation, which leads to an increase in blood volume over time.
For example, well-trained aerobic athletes can increase their blood volume substantially. Blood volume increases with chronic exercise due to the release of hormones like EPO and improved blood flow. This helps deliver more oxygen and nutrients to the muscles during exercise. This increase in blood volume helps to deliver more oxygen and nutrients to the muscles, improving their efficiency and endurance.