Discussion
Using Normalisation Process Theory, we have described the process of implementing a complex rehabilitation intervention, within the context of a research trial. Understanding implementation in trials is an important aspect of feasibility and pilot work. An improved understanding of the implementation process will enhance the earlier stages of trial design, and will maximise future potential for translation of findings into clinical care.We identified behaviours that mapped to all four constructs of NPT, with coherence and cognitive participation as dominant themes. We found the initial phase of coherence to be the starting point for implementation. The “work” that happened during this phase appeared to predict how subsequent stages of implementation played out. This may be due, in part, to the linear nature of research; where activities typically occur sequentially, in line with a pre-defined protocol.