A part of, yet apart from the team: Substantive membership and belonging of trans and nonbinary athletes.

Increasingly, bills and policies prohibit the participation of trans women in competitive sport. The current sociopolitical moment begs the following question: how do interpersonal interactional moments function alongside formal policies and rules to shape trans athletes' experiences of belonging in sport? Although formal institutional rules govern trans athletes' ability to compete in sport, informal social sanctioning also denies these athletes equitable, or even de facto, membership in sport. I draw upon two case studies to explore trans athletes' experiences of membership in elite "women's" sport. I apply Evelyn Nakano Glenn's work on citizenship to consider how trans athletes' experiences of belonging are influenced by both formal rules imposed by organizations as well as informal social interactions with members of their sporting communities. Inclusion is not synonymous with membership. Trans athletes render visible the ways in which this system functions to contain the diversity of humanity's gender expression.