Table 1.

Components of the motivational interviewing training program and app.

Motivational Interviewing Construct	Embedding within a Physiotherapy Consultation	Supplementation with the App
Change Talk: Developing reasons, needs and desires to increase level of physical activity.	Throughout usual conversations within a usual physiotherapy consultation, physiotherapists are taught how to facilitate change talk. For example, the physiotherapist is taught how to enquire as to why increasing physical activity might be useful in relation to a patient's values, needs and desires.	Module 1 of the app askes users about some of the things they value in life. For example a person may say they value playing with their children or walking their dog. The physiotherapist can build on this during consultations by facilitating the patient to link how increasing physical activity may fit in with these broader things they value.
Change Talk: Fostering and building confidence to increase level of physical activity.	Therapists are taught how to foster change talk regarding positive past performances during conversations with their patients during consultations. These may or may not be related to physical activity and are designed to build confidence in a persons' ability to implement a change, no matter how seemingly small.	Modules 3 and 6 of the app ask users a series of specific questions relating to past abilities. These are tailored towards a person's self-reported level of confidence. For example, someone who has a low level of confidence may receive a question about how they were able to achieve a goal in the past.
Reflections: Simple: Repeat or slightly rephrase what has been said Complex: Goes beyond a simple reflection in that we reflect what we understood was meant (can involve taking an informed guess)	Throughout usual conversations within a physiotherapy consultation, therapists are taught to reflect key components of a person's language to foster further change talk. An example of a complex reflection during a supervised exercise session; A patient may comment that the exercise is hard “In a good way”. The therapist may then reflect to the patient “It feels good to be moving again”.	The app can offer simple reflections. For example, in module 4 when users are asked to set an activity related goal, the app may reflect back “So your activity related goal is to… is this correct?“. The user may answer yes or no and may be asked to clarify if required.
Summaries: Are useful for bringing important information together, moving forward or providing an opportunity for patients to correct misunderstandings	Therapists are taught how to summarise a patient's core points related to change in physical activity. For example, therapists are taught how to take a brief moment at the start of the consultation to summarise progress over the last week or clarify any issues.	At the end of each module the app provides a summary of what was covered and this is repeated at the start of each module.