2.2. ENHANCE Intervention
The exercise intervention was based on clinical evidence for hip and knee OA [The group sessions also involved an educational component at weeks 1, 2, 3, 6 and 12. The education sessions, guided by HAPA principles (see Two focus groups were conducted and recorded. The number of included participants ranged from thee to six participants per group. This number of focus groups was selected based on previous research that outlines that 80% of themes can be elucidated from two to three groups. [