This chapter explores how chronic trauma shapes the somatic experiences of incarcerated individuals and contributes to pervasive dysregulation of the nervous system. Drawing on clinical insights and qualitative data from trauma-informed, mindfulness-based yoga programs in U.S. correctional facilities, it examines how the body becomes both a site of protection and disconnection in environments marked by violence, surveillance, and deprivation. The chapter outlines the neurobiological and psychosocial impacts of unresolved trauma—particularly among those with histories of racialized, gendered, and systemic oppression—and highlights the critical role of body-based interventions in supporting healing. Through the lens of polyvagal theory and embodied resilience, it argues that yoga can reintroduce safety, agency, and connection into bodies long trained to numb, brace, or dissociate. This work positions trauma-informed yoga not as a therapeutic add-on, but as a profound method of restoring dignity and relational capacity in spaces where dehumanization is routine.