Drawing on (auto)ethnographic research—on the process of becoming a marathon swimmer, this paper argues that conventional characterisations of marathon swimming as being ‘80 per cent mental and 20 per cent physical’ reprise a mind–body split that at worst excludes women and at best holds them to a masculine standard. This in turn draws the focus towards sensory deprivation, bodily suffering and overcoming, to the exclusion of the pleasures of swimming, beyond the expected ones such as the challenge of swim completion. (...) By exploring instead the ‘shifted sensorium’ of marathon swimming, and examples of the autotelic pleasures of swimming, this paper argues that training changes the way swimming body feels, and that it is these changes that enable a swimmer to feel ‘at home’ in an environment to which it does not naturally belong. This focus on the sensory aspects of swimming, and its unexpected pleasures, both highlights the ways in which those pleasures do not flow unproblematically to women, and brings to light alternative and politically provocative ways of experiencing the gendered sporting body. This highlights the contingency, however constrained, of even the most entrenched ways of thinking about bodies, both within and outside sport. (shrink)