no you shouldn't get one. those guys dont know anything more than regular dudes who learn from experience. as a matter of fact personal trainers know all the wrong information. also to be a personal trainer all you have to is pass a test. anyone can do it. some are even take home tests. a book is much better. or just find someone here who has a similar bodytype to yours and do what they do. or just try different things. you will learn what exercises work best for you in time if you keep a good diet. nobody can teach you what works for you.