Which factor is NOT associated with the intensity of plyometric exercises?

Previous training experience is not directly associated with the intensity of plyometric exercises. Instead, it primarily influences a person's ability to perform these exercises effectively and safely. Experience can determine how well an individual can execute plyometric movements, manage their landing mechanics, and reduce the risk of injury, but it does not inherently alter the intensity of the exercises themselves.

In contrast, contact times, drop heights, and external load directly impact the intensity of plyometric exercises. Contact times refer to the duration of ground contact during jumps, with shorter contact times generally indicating higher intensity. Drop heights involve the distance from which an athlete drops before performing a jump, where greater heights can increase the intensity due to the greater force upon landing. External load refers to additional weight added to the jump, which raises the intensity by increasing the work required during the exercise. Each of these factors contributes to the physiological demands placed on the body during plyometric training.