I leave it up to the client. I always do a final assessment, ask for a testimonial and see what they want to do.
I find that most clients who are happy with their results, have already thought about their next challenge and are ready to see where their training can help.
Others are happy with what they have achieved and continue on their way. I usually stay in touch with these clients and we tweak their program every month of so, so they’ll continue to be challenged and see results.
This is a great problem to have!