The vast majority of doctors, when presented with a patient asking such a thing, will do a 30 second "examination" (if you're lucky), then spout some platitudes about exercise being beneficial in moderation (which you could have gotten from a lifestyle magazine or a fortune cookie), then usher you out after 5 minutes so they can see the next patient waiting in line.

Unless you know the doctor personally, or are rich enough to see high-class private practitioners who will actually pay attention to you because of your money and/or status, that would be a gargantuan waste of time. Needless to say, I too am speaking from personal experience.