“…Three trials reporting significant between-group differences administered the programme in a community health club (Harkapaa et al, 1991;Linton et al, 1996;Reilly et al, 1989), and two trials produced significant between-group differences with group exercise training (Coppack et al, 2012;Harkapaa et al, 1991). Additionally, given the effectiveness of group-based physiotherapy programmes on pain outcomes (O'Keeffe, Hayes, Mccreesh, Purtill, & O'Sullivan, 2016), further research should explore the integration of the BCTs within group-based classes. Enjoyment has been found to be a strong mediator of exercise adherence in people with musculoskeletal pain (Hagberg, Lindahl, Nyberg, & Hell enius, 2009).…”