In this paper we explore whether and how ‘sport’ can be an adequate and valid sociological concept considering the multitude of contested meanings and definitions attached to ‘sport’ by different stakeholders in the sports field. Firstly, we argue that essentialist definitions of ‘sport’ too often one-sidedly focus on physical exertion and neglect the socially distinguishing nature of sportive practices as part of a lifestyle. Secondly, survey questions reflect this physical definition of ‘sport’ and assume that ‘sport’ has an obviously similar meaning to respondents. However, reflecting the struggle to define ‘sport’ in the sports field, people with different socio-demographic backgrounds differ in their understanding of the concept. Because current measurement of ‘sport’ does not adequately deal with the open and contested nature of the concept, suggestions on how to collect survey data on sport participation are presented.