Background The indoor soccer is a sport that presents contact situations, acceleration and deceleration, combined with accurate raisins and rapid change of direction. Despite the high incidences, the literature is scarce on this modality.

Objectives To analyze the injuries profile in indoor soccer athletes from various categories and find the relationship between the frequency of injuries and the volume of games in a season.

Design This is an observational study, transversal, about the injuries in the 2009 season.

Setting Athletes from seven competitive categories under 12, 13, 14, 15, 17, 20 years and adult of a sport club in Belo Horizonte, Minas Gerais, Brazil.

Patients 83 athletes who required physical treatment.

Interventions The physiotherapist report all injuries that occurred during the season, which required physical therapy treatment.

Mains outcome measurement The report describe: category, situation of contact or non-contact, if occurred during practice, games or other and the time lost, for a descriptive analysis. The number of games by each category was monitored for analyze the correlation between the injuries frequency with the volume of games by the Pearson test.

Results The athletes had 174 injuries which required physical therapy. The average of injuries by athlete was 2.1. The category with greater incidence was the adult; there was a tendency of higher age present a greater frequency of injuries. The majority of injuries occurred in situations of non contact and during training. The muscle injuries were mainly non contact, while contact had predominance of bone and ligament injuries. The Pearson's test indicated statistically significant correlation (R=0.79/p=0.034) between incidence of injuries and the number of games carried out.

Conclusion This profile brings important data for the development of preventive program, to design more specific interventions. Further epidemiological are necessary, mainly for the futsal by virtue of the scarce literature.