What tests are needed to check physical fitness?

Q: I am over 40 years. You are requested to guide me on which type of medical test should I undergo to know my physical fitness.

A:A thorough examination by a competent doctor should achieve your purpose. He/she will record your height, weight and blood pressure, examine your systems, test your urine and send blood samples for a full blood count, urea and electrolytes, liver function tests, serum lipids and thyroid function tests.