Final answer:
A GXT should be recommended by a healthcare professional, such as a physician, cardiologist, or exercise physiologist.
Step-by-step explanation:
A GXT (graded exercise test) is a test used to evaluate a person's cardiovascular health and fitness level prior to starting an exercise program. It involves gradually increasing the intensity of exercise while monitoring the person's heart rate, blood pressure, and perceived exertion.
A GXT should be recommended by a healthcare professional, such as a physician, cardiologist, or exercise physiologist. These professionals have the necessary medical knowledge and expertise to interpret the results of the test and determine if the person is fit to start an exercise program.
It is important to consult a healthcare professional before starting any exercise program, as they can also provide personalized recommendations and advice based on an individual's specific health condition and goals.