Control your diet will lead to less work in the Gym

For example my body burns 1850 k/cal per day (doing nothing, this is at rest).  Calculate an extra 400 k/cal for my gym time (calories burned training) and from here I can create a diet to gain a pound a week or lose.  All depends on individual goal.  But for me, I just want to maintain.  I bring this up because with my experience I can't tell you how many times I see trainers overtraining there clients.  Lastnight I had a trainer say, "well they don't get results (clients), so we train them harder".  O.K. stop,  If you are a trainer you have to be a coach too.  You have to help your client stick to that diet b/c that's where the results come from, not killing them in the gym.  Anyway, rubbed me the wrong way.  You have to take care of your clients so they will enjoy it, come back and hopefully learn the tools you have provided them so they may venture out on there own.