A PAR-Q is a written assessment that can predict an individual's readiness for exercise and does not need a health professional to complete, like the others. Medical screenings and medical evaluations both need doctors, but the medical evaluation test is more in-depth. The exercise stress test is used to test the body's response to vigorous exercise. Usually, this test is used when a doctor or patient suspects something is wrong and could potentially endanger the patient's life or health.