  The starting point for the sex segregation debate is Jane English’s ‘Sex Equality in Sport’ (1978). English considers what equality of opportunity between the sexes requires in sport. She argues that a just society would incorporate a greater variety of sports than at present. Specifically, sports that reward ‘women’s distinctive abilities’ (English, 1978, 227) (e.g. flexibility, low centre of gravity) would be more numerous. On grounds of self-respect, women should enjoy roughly half of the ‘basic benefits’ of health and recreation. This includes the right to equal facilities. This would require significant re-ordering of how resources are distributed between the sexes within sport. Ultimately, however, English advocates a (qualified) retention of binary sex segregation in sport. The contours of this distinction have been challenged by intersex, trans, and non-gendered athletes who do not fit comfortably into either category. The question ‘Who is a sportswoman?’ (Camporesi, 2017) has never been more contested.