Since the beginning of the new millennium, the use of mental practice and movement imagery within several medical professions in rehabilitation and therapy has received an increased attention. Before this introduction in healthcare, the use of movement imagery was mainly researched in sports science. Mental practice is a complex intervention. When a complex intervention is applied in a new target group or population, the intervention is most likely needed to be adjusted, developed, and evaluated. Recently, a dissertation has been published in which the researchers describe their efforts to transfer the use of movement imagery in sports to rehabilitation. This study reports two aspects from this research project: (a) What did the researcher do? (b) What do the results mean for future research? First, however, some background information is given, in which the use of movement imagery in athletes is discussed.