This book focuses on language and identity online within the context of running from an interdisciplinary perspective. It brings together digital ethnography, existential phenomenology, interpretative phenomenological analysis and sporting embodiment in the pursuit to explore runners’ lived experiences and identities online. Language, identity and identity online are often studied in broader social contexts such as education, culture and politics, and running is intimately related to key issues in contemporary society, such as health and exercise, sport and nationalism, embracing a variety of discourse types and having implications more generally for our identity as human beings. The evolving online media through which people make sense of who they are and which groups they belong to are enabling new ways of realising identities and relationships. This book will be of interest to applied linguists, discourse analysts, as well as those interested in sports, sports psychology, and identity enactment.