This PhD research investigates a contemporary leisure practice -- outdoor sport tourism -- and the multiple ways it engages with space, from the body to the global. This practice relies on specific mobilities and specific understandings of space; this research is an attempt to seize these specific features and to situate them in the contemporary leisure and travel cultures. Based on the theories of 'practice', this research investigates in particular the relationship between action and the 'informational' dimension of practice; the centrality of the latter for sport tourism is evidenced by the increased use of digital technologies and increased mediatization.