Researchers measured the exhaled breath at rest and during different exercise intensities among eight men and eight women.
as a situation where COVID-19 outbreaks can occur, but new research shows this can be exacerbated by the level of fitness intensity.in the Proceedings of the National Academy of Sciences , researchers in Germany designed a method for measuring aerosol particle emission at rest and during different exercise intensities among eight men and eight women.
"By measuring aerosol particle concentration and ventilation in one individual, we were able to calculate aerosol particle emission that is a more direct measure of the risk of pathogen transmission by aerosol particles by one individual than the aerosol particle concentration in exhaled air or in room air," the study authors wrote.
In addition, fitter, endurance-trained subjects exhaled 85% more particles during maximal exercise than untrained subjects which was considered a significant difference, according to the team. "This finding can be used to design improved mitigation strategies for indoor group exercise," the study’s authors added, noting that the data has important implications for infection control during indoor group exercise.
The researchers said the results indicate that protective measures inside gyms may be important, including keeping about five feet between exercisers during workouts. They also said gyms should consider 15-minute airing breaks in between classes, pre-exercise infection testing of participants, safety shields between exercisers, limited time spent in an exercise room and the wearing of masks even during exercise.
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