Repeated Sprint Ability (often shortened RSA) is the capacity of an athlete to perform multiple short-duration, high-intensity sprints with minimal rest in between, maintaining speed and power throughout. It measures an athlete’s ability to resist fatigue during intermittent sprinting efforts, crucial in sports like football, basketball, and hockey where players frequently engage in repeated bursts of maximal effort.

Testing RSA helps determine an athlete’s endurance, anaerobic power, and recovery efficiency during high-intensity activities. It provides valuable insights for optimizing training, identifying strengths and weaknesses, and enhancing performance in sports requiring sustained high-intensity efforts over time.