Jill is a new client that you are meeting with this morning. You plan on asking her what time of day she enjoys working out, what her previous experiences were with exercise, and what type of classes or workouts have worked and not worked for her in the past. What stage of the client-trainer relationship are you in with Jill? Investigation Stage Personal trainers should use the investigation stage not only to learn about a client’s current health and fitness, but also to understand a client’s exercise likes and dislikes.