Measures completed by staff (research instructor, facility staff):

Motivation to participate—Participants’ motivation was assessed by the exercise supervisor at each exercise session based on their observation and interpretation of participants’ expression, verbal prompt and body language using a five-point Likert scale, from no motivation to very high motivation [Group observational measurement of engagement (GOME)—was used to evaluate engagement in the physical and social activity and includes engagement on an individual and group levels using a Likert scale [The GOME group level engagement included record of number of participants in the group, and positive and negative interactions using a 6-point Likert scale.
Wandering behavior—Any wandering behaviour (walking off) around the park area, was documented by the staff.General motivation and engagement behaviour at selected time points throughout the program—Motivation to go to the activity was assessed at 4 time points: at week one of the program, halfway through (week 6) and at the end (week 12), and at the completion of the maintenance phase (week 24). Motivation was assessed using a five-point Likert scale from very negative (0, never wants to or usually does not want to go to sessions, despite motivating attempts) to very positive (score 4) [