BackgroundAddressing the gap between research and practice is crucial for enhancing reproductive healthcare outcomes. In Rwanda and other low- and middle-income countries, bolstering health researchers’ implementation science (IS) capacity is essential. We present a pre-post-intervention study assessing the influence of an intensive IS training program on Rwandan reproductive health researchers’ perceived IS knowledge and self-efficacy in applying IS in their own research. MethodsTo introduce IS principles, we held a one-day training for a diverse cohort of 25 sexual and reproductive health researchers in Rwanda. The training encompassed modules on IS concepts, methodologies, and practical applications. Pre- and post-training assessments gauged changes in participants’ perceived IS knowledge and self-efficacy in applying IS in their own work. ResultsThe study revealed a significant improvement in self-efficacy related to performing IS related tasks. Researchers reported heightened confidence in designing and implementing evidence-based interventions. In terms of perceived knowledge, participants retained what they learned at 4 months. The training fostered a collaborative learning environment, encouraging participants to exchange ideas and experiences. ConclusionTargeted training in IS appears to enhance reproductive health researchers’ capacity to translate research into practice, potentially leading to improved healthcare outcomes in Rwanda. Moving forward, we advocate for the Ministry of Health to establish structures for IS research agenda-setting, particularly for sexual and reproductive health and rights. Ideally, universities, health systems, and research institutions will incorporate IS capacity strengthening into their routine activities. Ongoing training is crucial to reinforce and expand IS knowledge. Our findings are expected to inform future interventions and guide policy development.