Research shows that physical activity (PA) -related professionals perpetuate weight stigma and discrimination in their practices by holding antifat attitudes. Given the adverse outcomes associated with weight stigma and discrimination (including PA avoidance), researchers and fat activists have proposed and implemented a range of strategies to reduce weight stigma and cultivate inclusive PA settings. In this paper, we summarized and organized research-informed strategies for reducing weight stigma and creating weight-inclusive climates in fitness spaces. We adopted a socioecological model to organize a variety of strategies for improving weight inclusivity in fitness spaces at the intrapersonal, interpersonal, and structural levels. Ranging from staff training to adjusting the physical space, the strategies proposed in this paper aim at dismantling limited and harmful weight-centric narratives and practices that keep fat individuals marginalized from PA settings.