# Mapping the type, frequency, intensity, temporality, and pathways of dissemination strategies during the national scale-up of TransformUs Secondary

## TL;DR

This study maps the strategies used to scale a school-based physical activity initiative in Australia, highlighting how they evolved over time and were delivered to schools.

## Contribution

The paper provides a detailed characterization of dissemination strategies used during the national scale-up of a school-based intervention.

## Key findings

- The most frequent and intensive strategies were promotion via mass media and developing educational materials.
- Dissemination shifted focus from partner organizations to school staff after the initiative launch.
- Over half of the strategies were delivered directly to school staff.

## Abstract

Schools are ideal settings for implementing evidence-based physical activity interventions at scale due to their wide reach. However, dissemination strategies used to achieve scale are rarely reported.

This study aimed to describe the strategy type, frequency, intensity, temporality, and pathways used in disseminating the TransformUs Secondary initiative across Australia over the first 16 months of national scale-up.

TransformUs Secondary is a whole-of-school initiative that targets behavioral, environmental, and pedagogical strategies inside and outside the classroom to reduce sedentary behavior and increase physical activity among adolescents aged 12–18 years. Since October 2023, the TransformUs team and 16 partner organizations collaboratively disseminated the initiative nationally. A dissemination activity log was used to record dissemination strategies, which were subsequently mapped post hoc to existing frameworks to categorize type, frequency, intensity, temporality, and pathways. Data are reported descriptively and graphically.

Between October 2023 and February 2025, 10 discrete strategies were identified, with the most frequent and intensive strategies being “Promotion via mass media” (33.2%, 110 person-hours), “Develop educational materials” (20.8%, 48 person-hours), and “Maintain partner engagement” (12.4%, 20 person-hours). Strategy frequency and intensity fluctuated and increased after the initiative launch, shifting the focus from targeting partner organizations to targeting school staff. Notably, 54.3% of dissemination strategies occurred via direct pathways to school staff.

Reporting dissemination strategies and pathways clarifies how school-based interventions are scaled in practice, providing evidence to inform research, guide policy, and support effective implementation in schools.

The Clinical Trials Registration #ACTRN12622000600741.

Graphical Abstract