Table 3.

Example mapping of facilitator behavior change technique messages following the behavior change wheel framework. OA: osteoarthritis.

Facilitator	COM-Ba category	TDFb domain	Intervention function	BCTc	SMSd content
Accurate disease knowledge	Psychological capability	1. Knowledge	Education	5.1 Information about health consequences	Let’s bust this myth - Surgery is not inevitable if you have knee OA! Exercise is one of the most effective ways to reduce your knee pain and prevent surgery. Stick with your exercise to see the benefits!
Prioritizing exercise	Psychological capability	14. Behavioral regulation	Enablement	10.9 Self reward	Did you prioritize your exercise this week and get them done? Then reward yourself, (name)! Sticking to an exercise program for this long is a real accomplishment that deserves celebration.

^aCOM-B: Capability, Opportunity, Motivation model of behavior.

^bTDF: Theoretical Domains Framework.

^cBCT: behavior change technique.