What does stretching primarily aim to improve in athletes?

Stretching primarily aims to improve flexibility and range of motion, which are crucial components of an athlete's physical capabilities. Flexibility refers to the ability of muscles and tendons to stretch, while range of motion describes the distance and direction a joint can move.

Improving flexibility can enhance performance in various sports by allowing athletes to achieve optimal positions, prevent injuries, and reduce muscle soreness post-exercise. For instance, greater flexibility can help in preventing strains during sudden movements, which is essential in contact sports or activities that require a wide range of motion.

The other options focus on separate aspects of athletic performance. Endurance and strength training are important, but they specifically deal with muscle conditioning and stamina rather than flexibility. Speed and agility relate more to quickness and coordination rather than the stretching and lengthening of muscles. Thus, stretching is uniquely positioned to enhance flexibility and range of motion, making it fundamental for overall athletic performance.