What does a personal trainer do? I meet each client to discuss what he or she is looking for. It could be from improving general fitness to losing - or, in a few cases, - weight. I then devise a training program for them which I think will them to achieve their . If they’ve had anything with them, say a back , I speak to their doctor who will me what not to do. If someone eats and drinks too much, it’s easy to suggest they , but if that doesn’t , I look at their diet. I prefer to train on a one-to-one , though I do sometimes work with if they are friends and want to train together.