What principle of PRT emphasizes the need for gradual increase in exercise intensity?

The principle of progression is vital in physical readiness training (PRT) because it highlights that individuals should gradually increase the intensity, duration, and frequency of their training over time. This gradual progression helps to prevent injury and allows the body to adapt to the growing demands placed upon it.

By adhering to this principle, soldiers can enhance their strength and endurance effectively without overtraining. It also acknowledges the need for individuals to build a solid foundation before moving on to more challenging levels of activity. This ensures that the body can handle increased stress, optimizing physical performance and overall fitness.

The other principles, while important in their own right, do not specifically address the gradual increase in exercise intensity. Precision relates to the correct execution of movements, integration focuses on combining different training elements, and recovery emphasizes allowing the body time to heal and adapt post-exercise.