Air quality in an air ventilated fitness center reopening for pilot study during COVID-19 pandemic lockdown

During COVID-19 lockdowns less people were able to fulfill the WHO recommendations on physical activity. Also, fitness centers were associated to SARS-CoV-2 superspreader events. However, the risk of infection can be strongly reduced by outdoor air ventilation. To investigate whether a reopening of fitness centers can be justified,  Except for one room, the observed  To summarize, a combination of ventilation, restriction of the number of visitors and surveying the