2019 No https://pubmed.ncbi.nlm.nih.gov/30068229/#:~:text=The%20highest%20increase%20of%20CO,increased%20with%20increasing%20physical%20activity. Kapalo, Peter Europe Review Students Teachers Temperature Humidity Carbon Dioxide (CO2) Educational buildings Indoor environment Carbon dioxide (CO2) Physical activity Results of objective measurements confirmed strong correlation between CO2
concentration occupancy for all measurements. Recommended value for indoor CO2
level according to Pettenkofer (1,000 ppm) was exceeding in 60.9%. Results of this study
showed the insufficient ventilation intensity in classrooms as well as obvious rise of CO2
concentration during the exams. The highest increase of CO2 was recorded during harder physical activity (run on the spot, squats, right and left side lunges, and rotating of the hips).
Regarding CO2 production by respondents it can be see that it is visibly increased with increasing physical activity.