Final answer:
The correct answer is option A. Warm-up, Core Workout, Cool-down.
Step-by-step explanation:
The PRT (Physical Readiness Training) System you're referring to is likely a term for a structured approach to physical exercise, which encompasses various methods to improve fitness and readiness. The three training phases you mentioned are likely to include warm-up, core workout, and cool-down, which matches option A in your question. These are standard components of an effective exercise routine.
Aerobic exercise, anaerobic exercise, and flexibility exercise are three types of physical activities, each with different effects on the body. Aerobic exercises, like jogging or swimming, enhance cardiovascular health and increase muscular endurance. Anaerobic exercises, such as lifting weights and sprinting, are designed to increase muscle strength. Flexibility exercises focus on stretching the muscles and joints to improve their range of motion and prevent injuries.
It's essential to warm-up before engaging in intense activities to prevent injuries. This phase typically involves light activities and stretching, gradually preparing the body for more strenuous exercise. Following the warm-up, the core workout is performed, which may comprise any combination of aerobic, anaerobic, or flexibility exercises, depending on fitness goals. Finally, a cool-down is recommended to allow the body to gradually recover from the exertion, often including light activities and further stretching to minimize muscle stiffness.