Assessing the Acceptability of a Preschool-Based Multi-Component Physical Activity Intervention Entitled "I'm an Active Hero" (IAAH): Process Evaluation of a Feasibility Trial.

The findings suggest that the IAAH programme was acceptable to both preschool staff and parents. However, the identified barriers to intervention delivery and engagement should be addressed in the planning of a future cluster RCT to evaluate the efficacy of the intervention.