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Background: Interventions to promote physical activity (PA) among women breast cancer survivors (BCS) tailored to real-world contexts within low to middle-income countries are limited. Purpose: The aim of this study was to assess the uptake and effect of ���My Body���, a theory-driven intervention co-created through cross-sectoral cooperation to promote PA among BCS in Bogot��, Colombia. Methods: We conducted a quasi-experimental pilot study employing a mixed-methods approach to assess the 8-week, 3 times/week group dance PA intervention. The effect on participants��� PA levels (measured by accelerometry), motivation to engage in PA, and quality of life was evaluated using a difference-in-difference analysis. The qualitative method included semi-structured interviews thematically analyzed to evaluate the uptake. Results: Based on real-world setting conditions, 64 BCS were allocated on the intervention (N=31) and the control groups (N=33). In the PA arm, 84% attended ���60% of PA sessions, and percent of women meeting ���500 metabolic equivalents/week (METs) (���150 mins/week) increased from 43.7% to 75% (increase in controls=0%). PA participants significantly increased ratings of motivation (change score=0.45, vs. control -0.05; P=0.03), and reported improvements in perceived behavioral capabilities to be active. Conclusions: The dancing intervention showed promise for improving PA and should be tested in a larger crossover trial. The high attendance, behavioral changes, and successful cross-sectoral delivery indicate the potential effectivity, feasibility, and scalability of the intervention for BCS in Colombia. Culturally appropriate PA programs tailored to real-context community settings have the potential of generating behavioral changes among BCS in middle-income countries. Funding: National Institutes of Health [Award 5P20CA217199-02], the CRDF Global [Agreement OISE-19-66198-1]., The Health & Fitness Journal of Canada, Vol. 14 No. 3 (2021): Proceedings from the 8th International Society for Physical Activity and Health Congress

Additional file 1: Supplementary material 1. Our Voice results: themes used to code Discovery Tool data per study and respective examples.

Additional file 2: Supplementary material 2. Ripple Effects Maps created by participants to report outcomes of the Recreovìa and My Body physical activity programs, respectively.