Physical activity improves physical and psychosocial outcomes in healthy children and in children with a range of chronic health conditions. Unfortunately, children with chronic health conditions have lower levels of physical activity compared to their healthy peers due to multiple restrictions in physical activities and therefore tend to have lower levels of physical activity compared with their peers. This paper describes the protocol for Move to Improve, a pragmatic trial of an individualised physical activity intervention for children with chronic health conditions.

Using the RE-AIM framework, this study aims to test the feasibility of Move to Improve, an 8-week hospital-based individualised physical activity intervention. We will recruit 100 children aged 5–17 years who are diagnosed with type 1 diabetes, cancer, postburn injuries and cerebral palsy to a single-arm, pragmatic feasibility trial. The primary outcomes (objective moderate to vigorous physical activity, quality of life and goal attainment) and secondary outcomes (including aerobic capacity, body composition, motor function, grip strength and psychosocial outcomes) will be assessed at baseline, post intervention and at 6-month and 12-month follow-ups. We will conduct semistructured interviews with participants and their primary caregiver at a 2-month follow-up to capture aspects of feasibility. Quantitative data will be reported descriptively, and qualitative data will be analysed using thematic analysis. Data gathered from this study will inform service decision-making and future trials.

The study has received ethics approval from the Government of Western Australia Child and Adolescent Health Service Human Research Ethics Committee (RGS6677). Findings of this research will be communicated to the public through peer-reviewed publications, conference presentations, reports, infographics and information sheets. Modifications to the protocol will be outlined in the trial registry and journal publications. Authorship will be in accordance with the International Committee of Medical Journal Editors.

Australian and New Zealand Clinical Trials Registry Number: ACTRN12624000836538.