The research suggests that the results do last. In many ways the LP is like joining a gym. At the beginning you have to work hard to create the level of fitness you want but once achieved, maintaining that fitness is much easier. This is the same for the LP, you need to put the work in to get the results you want and continue to use the tools as you have been taught and when required to maintain them.
Once you have completed your training, we provide support to help you establish yourself. The LP then becomes a tool for life, it is there for you to use when you face any new challenge. You just need to ensure you use it.