Whether practiced in schools or in sports clubs, the changing room provides a site for transforming yourself from the everyday you to the sporting you and then back again. This transformation involves social, cultural, material, sensorial and affective aspects. For instance, shedding the outer skin, metaphorically speaking, reveals what is beneath, i.e. the naked body with all its beauty and fleshly flaws. The commonplace mirrors support not only individual physical scrutiny, as well as social interaction on what is displayed, but visibility per se. This is a place for regulating looks, but also for regulating observational practices. Although perhaps foregrounding the visual, changing rooms are nevertheless highly multisensorial. The echoing glazed tiles in the showers bounce the sound of cascading waters. Bodily odours like sweat mix with smells from shampoo, various skin products and deodorants. Although this space and the transformations occurring here are fascinating and may provide new knowledge on the way we handle our material bodies in relation to sports, it is an ethically challenging space for doing ethnography. How can this space and the transformations occurring here be studied ethnographically without transgressing integrity?