These tests are listed in order of increasing rigor. The PAR-Q is a written assessment that predicts one's readiness for exercise. The other three require the help of a health professional to complete. ... Finally, the exercise stress test is designed to test the response of the body while exercising vigorously
I think the answer is it prepares your body for necessary action because I learned something like anxiety and how it help you take action last year. I hope this helps you.
