Semper Fit Basic Fitness Course (SFBFC) Practice Exam 2025 - Free SFBFC Practice Questions and Study Guide

After more than 16 weeks of aerobic training, one important long-term physiological adaptation that can be expected is an increased plasma volume of the blood. This adaptation plays a crucial role in improving cardiovascular efficiency and overall aerobic performance.

As individuals engage in sustained aerobic training, their bodies undergo several adaptations to enhance the delivery of oxygen to working muscles. Increased plasma volume helps to improve stroke volume, which refers to the amount of blood pumped by the heart with each beat. This adaptation can lead to a more efficient cardiovascular system, where the heart does not have to work as hard to supply the necessary blood flow during physical activity.

Furthermore, an increase in plasma volume supports a greater capacity for thermoregulation, enhancing the body’s ability to manage heat during prolonged exercise. It also aids in improving muscle hydration and assists with nutrient delivery, which are vital for recovery and performance.

The other options do not align with the typical physiological responses associated with sustained aerobic training. For instance, a decrease in the number of red blood cells would not be a beneficial adaptation; rather, training often leads to increased red blood cell production, improving oxygen transport. Weight loss may occur as a result of training but is not a direct physiological adaptation in response to aerobic training—it is more of a potential