Fitness centers demonstrate CO2 concentration levels above recommended standards

This study aims to compare carbon dioxide (CO 2 ) concentration levels measured in fitness centers with the applicable guidelines from Brazil, France, and Europe. Three fitness centers in Florianopolis, Santa Catarina State, Brazil (fitness centers A, B, and C) participated in this study. The fitness centers have different physical characteristics and ventilation systems. Fitness centers A and B have split ventilation systems, while fitness center C has a central ventilation system. The air quality was assessed by determining the CO 2 concentration level, as measured by a non-dispersive infrared CO 2 concentration sensor. Data was analyzed with descriptive and inferential statistics. All three fitness centers recorded CO 2 concentrations significantly above (p = 0.00) the maximum level of 750 ppm recommended by the European standard. Fitness centers A (= 3752.13 ppm) and C (= 1360.89 ppm) also had CO 2 concentrations significantly above (p = 0.00) the maximum level of 1000 ppm recommended by the Brazilian and French guidelines. CO 2 concentrations in fitness centers were significantly above the maximum permitted levels. Besides suggesting inefficient ventilation in these fitness centers, high CO 2 concentrations can impair indoor air quality and increase risks to the health of practitioners.