New research shows shows why intense exercises may cause superspreader events during the COVID-19 pandemic.
, people emit about 132 times as many aerosols per minute during high intensity exercise than when they’re at rest, which the researchers warn raises the risk of a person infected with COVID-19 setting off a superspreader event. At rest, people emitted an average of 580 particles each minute, but during maximal exercise—in which researchers gradually increased intensity until the subjects were exhausted—people emitted an average of 76,200 particles a minute.
Nevertheless, there were some valuable findings to come out of the work. “[As an exercise physiologist], and we knew before that when you exercise, there’s more air coming out of a person,” says Henning Wackerhage, a co-author and professor of exercise biology at Technische Universität München. “But we didn’t know before, and which, quite frankly, I didn’t expect, is that also when we exercise hard: there are more particles per liter of air.
Some of the participants also emitted much more aerosols during high-intensity exercise than others; in particular, fitter people with more experience in endurance training emitted 85% more aerosols than people without such training. Dr.
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