Does an infographic increase knowledge of physical activity after knee joint replacement?

Intervention name: Co-designed infographic 6 weeks to 6 months after total knee replacement Intervention aim: Increase knowledge of physical activity and self-efficacy for exercise Materials used: Co-designed infographic that provides health information specific to increasing knowledge of key physical activity constructs Procedures: The infographic will be designed with the aid of consumers and will consist of two stages. Stage 1 - Consumers co-design a draft infographic. 5-10 consumers will be recruited in the stage 1 co-design phase. Consumers will meet with the researcher for a single 1 hour workshop to provide their ideas on the layout and design (e.g. graphics, the layout, the wording, which aspects of physical activity to emphasise) of an infographic. Participants will be given the choice as to whether they meet the researcher via a video link (e.g. Zoom) or in person at a location of their choice. Participants who choose to meet with the researcher via video link may meet with the researcher and 2-3 other participants or individually - this depends on the times that participants are available to participate in the video link workshop. Participants who prefer to meet face to face with the researcher will do so individually. 5-10 participants will initially provide their perspective on the layout and design of an infographic that provides physical activity information to people after total knee replacement. The final numbers of participants who are involved in the initial co-design phase will ultimately be determined by data saturation i.e. no new ideas about infographic design are being presented by the participants. When meeting with the consumers, the researcher will present infographics on other topics as examples to help guide the participants. The researcher will then collate the infographic design ideas from the participants and, with the aid of a graphic designer, produce a draft infographic. Stage 2 - Consumers provide feedback on draft infographic. The draft infographic will then be shown to 5 more participants who will be invited to provide feedback on the layout, design and content of the draft infographic. Consumers will again be given the option to meet with the researcher via video link or face to face. The feedback session will be conducted once with each consumer and last for an hour. The researcher will again collate the feedback on the draft infographic and, with the aid of a graphic designer, produce the final infographic. The final version of the infographic will then be used in the randomised controlled trial. During both phases of infographic design, co-design principles will be used to maximise the ability of the infographic to resonate with people after knee joint replacement and increase their knowledge of physical activity. Randomised controlled trial phase. The infographic intervention will be provided to participants 6 weeks to 6 months after their knee joint replacement surgery. The infographic is likely to provide information on the following aspects of physical activity: how much physical activity the World Health Organisation recommends for health, the type of physical activity that benefits health, how to distinguish between low and moderate-intensity physical activity, examples of the different types of physical activities that people could engage in after recovering from knee joint replacement e.g. brisk walking or hydrotherapy. The intervention will be applied once only. Who provides intervention: Consumers who have had a total knee replacement will co-design the intervention (infographic). Researcher (background of physiotherapist) to provide infographic to participants How intervention provided: Infographic either emailed or mailed to participants (participants preference). The study researcher will contact each participant in the intervention arm by phone or email to confirm that they have received the infographic.