A 16-year-old athlete is trying to improve their endurance by increasing their stroke volume. What is the primary factor that determines stroke volume?
Q1. A 16-year-old athlete is trying to improve their endurance by increasing their stroke volume. What is the primary factor that determines stroke volume?
Answer: Preload
Explanation: Preload is the primary factor that determines stroke volume. Heart rate, blood pressure and vasodilation contribute to cardiac output indirectly.