Copyright © 2021 the author(s). Combined action observation and motor imagery (AOMI) interventions involve observing a movement demonstration, usually via video, whilst at the same time imagining the feelings and sensations involved in executing the observed action. Research findings indicate that AOMI interventions can be effective for improving sport performance, yet no guidelines currently exist within the literature to inform applied sport psychologists how to develop and implement AOMI interventions with athletes. The aim of this article is to address this gap in the applied sport psychology literature. Accordingly, the article provides an overview of the ‘Science of AOMI’ by discussing the neurophysiological, cognitive, psychological ...