What training method is commonly used to build stamina in racehorses?

Building stamina in racehorses is crucial for their performance in long races, and long gallops or timed workouts are a widely accepted method to achieve this. This training approach focuses on conditioning the horse to endure prolonged exertion, gradually increasing the duration and intensity of these sessions to enhance their cardiovascular capacity and muscle endurance.

Long gallops help develop the horse's aerobic fitness, allowing for a more efficient use of oxygen and energy during races. Timed workouts track the horse's progress and determine if they are achieving the desired fitness levels. This method is essential for preparing the horse to maintain speed over longer distances, which is critical in competitive racing scenarios.

In contrast, short sprints primarily focus on speed rather than stamina, while obstacle course training introduces agility and coordination without specifically building endurance. Walking on a treadmill can be used for gentle conditioning but does not replicate the demands of racing as effectively as long gallops do. Thus, the focus on extended, purposeful workouts makes long gallops or timed workouts the optimal training method for developing stamina in racehorses.