ASDactive: An Integrated Theory-based Intervention to Promote Habitual Physical Activity

ASDactive: Feasibility of An Integrated Theory-based Intervention to Promote Habitual Physical Activity Behaviours in Autistic Youth

ASDactive is a theory-based behaviour change intervention aimed at improving the physical activity behaviours of autistic youth. The feasibility of the intervention will be tested through interviews with participants and stakeholders. "Proof of concept" will be tested through preliminary measures of physical activity measured before and after the intervention.

ASDactive is has been developed with guidance from autistic people and stakeholders in autism. It is informed by motivation and behaviour change theory, specifically habit theory. The intervention aims to improve the habitual exercise behaviours of autistic youth by focusing on their strengths and interests.

The feasibility study will run for 3-months, with a further 3-month follow-up period. Participants will attend motivational sessions in person where they will self-select physical activity habits to incorporate into their daily lives. They will be taught fundamental movement skills that they can use in their own leisure time. In-person sessions will be held once per fortnight with online sessions twice weekly. Participants will be encouraged to engage with as many sessions as possible, but part of the evaluation will assess uptake and engagement.

Self-determination theory and habit theory will underpin all aspects of the intervention and autistic strong interests will be embedded in the materials used.

Inclusion Criteria:

• Young people aged 10-24-years diagnosed with Level 1 autism or Asperger's syndrome

Exclusion Criteria:

• Physical conditions or injuries that might hinder physical activity participation