What happened to the person's vital capacity over the course of the training period Why?

Over the course of the training period, the person's vital capacity likely increased due to the enhancement of respiratory muscle strength and improved lung function. Regular aerobic exercise can lead to better oxygen uptake and utilization, resulting in increased lung capacity. Additionally, consistent training may enhance overall cardiovascular fitness, which contributes to improved respiratory efficiency. This adaptation is essential for supporting greater physical exertion and endurance.