Shuttle runs are a type of physical exercise that involves sprinting back and forth between two markers set a specific distance apart. Typically, the distance is around 10 to 20 meters. This exercise is commonly used in sports training to improve speed, agility, and cardiovascular fitness. During a shuttle run, participants start at one marker, sprint to the other, touch the ground, and return. This repetitive motion helps enhance quickness and endurance, making it a popular drill in various sports, including basketball and soccer. Shuttle runs can be easily adapted for different fitness levels and training goals.