Resumen: Indoor Cycling (I.C.) is one of the activities with the greatest demand nowadays, and in recent decades, it has been implemented in most fitness centers and gyms in a large part of the world. Our objective is to know the I.C. instructor''s professional profile in Spain, as well as other aspects related to their work methodology and working conditions. The respondents were 57 instructors from different parts of Spain (the country), all of them occupying the position of I.C. instructors. They were surveyed based on an instrument designed ad hoc. A quantitative cutting methodology has been used. Although it is not a representative sample, the data suggest that its profile is that of a male of approximately 35 years old, with more than 5 years of experience, who also teaches other directed activities, and works for others. He teaches between 6-7 sessions of C.I. weekly. There is great disparity in terms of their level and type of training. Idioma: Español DOI: 10.47197/retos.v41i0.83047 Año: 2021 Publicado en: Retos 41 (2021), 708-717 ISSN: 1579-1726 Factor impacto CITESCORE: 2.4 - Social Sciences (Q2) - Health Professions (Q2) - Medicine (Q3)