What is a characteristic of a deep girth in horses?

A deep girth in horses is characterized by a conformation that allows for better lung capacity. This anatomical feature provides ample space for the horse's lungs to expand fully during breathing, which is crucial for maximizing oxygen intake, especially during strenuous activities like riding or racing. This design is beneficial for athletic performance, as it directly impacts the horse's endurance and overall respiratory efficiency.

In contrast, a flat and shallow conformation does not support optimal lung capacity, potentially leading to restricted breathing. Similarly, an elongated conformation might affect the efficiency of the horse's movement and balance, negatively impacting its overall performance and comfort. Therefore, the depth of the girth is an important factor in equine conformation, as it plays a vital role in the respiratory health and athletic ability of the horse.