The goal of the present study was to delve into the knowledge of the socio demographic features of professionals in the Spanish fitness sector according to the main position performed within the organization. The sample included 1,662 professionals (average age=32.14; SD=6.80; 50.7 % males; 49.3 % females). To collect data an ad hoc -designed questionnaire was used. Results showed that gender, age and level of training turned out to be different depending on the position held. It may be concluded, for starters, that professionals in the Spanish fitness sector have ample experience in their profession and a training level adequate to the needs of their respective positions.