A cardinal rule of personal training is that every regimen must be tailored to suit the needs of the trainee. As personal trainer, it is your job to map out a path for your client so they can reach their goal. How you design the regimen will depend partly on what this goal is, but that is not all. You have learned during your interview the kind of lifestyle they have, how much time there is at their disposal, medical history and health risk factors (if any), and availability of gym implements. Now you shall create a training program based in these factors. This you will draw from personal knowledge and experience of what works.