When seeking out personal training, always verify your professional fitness trainer’s credentials. Always. And don’t assume that a certification is enough. A good trainer is more than a smart guy who passed a paper test about anatomy or physiology. He or she is personable, friendly, motivating and encouraging. Gym Trainer have knowledge about fitness but may not be able to teach you what they know or lack communication skills that make it easy for you to not only do what they say, but understand the reasons why.