Fitness classes with intense exercise are well suited for the spread of the new coronavirus, but some do not spread
Regarding the new coronavirus infection (COVID-19), it has been reported that many people were infected in the gym and fitness. However, according to the latest report from the Center for Disease Control and Prevention (CDC), it can be said that 'fitness class' is diverse in one word, 'classes where COVID-19 is widespread' and 'classes where COVID-19 is hard to spread'. Is shown.
Early Release-Cluster of Coronavirus Disease Associated with Fitness Dance Classes, South Korea-Volume 26, Number 8—August 2020-Emerging Infectious Diseases journal-CDC
In South Korea, people with COVID-19 infections are being tracked, but according to public health officials, when we interviewed the people with COVID-19 infections that were confirmed in succession, all of them were confirmed on February 15th. It turned out that he was participating in a dance class held. Sukbin Jang, a clinical assistant professor who studies infectious diseases at Dankook University School of Medicine, investigated how infections spread through fitness classes.
Fitness dance classes that match Latin music have become popular in Korea as a strong cardio exercise. At the February 15 workshop, 27 instructors participated in a four-hour intensive training, eight of whom were found to be positive by RT-PCR . On the day of the infection, all infected were asymptomatic. Of the eight people infected with COVID-19, six were from Cheonan and one was from Daegu.
By March 9, 112 COVID-19 cases associated with fitness dance classes were identified at 12 sports facilities in Cheonan. The only instructor who participated in the workshop on February 15 and was positively confirmed to be COVID-19 afterwards had only mild coughing symptoms. I was going.
Below is a diagram showing how the infection spread from six instructors in Cheonan who were confirmed to be COVID-19-positive after participating in the workshop. The instructors are A, B, C, D, E, and F shown in red, and it can be seen that the more participants in the class conducted by the instructor, the more the infection spreads.
Fitness dance class students with positive COVID-19 were symptomatic on average 3.5 days after joining the class. Of the infections tracked, 50.9% occurred in the form of 'from a fitness class instructor to a student', 33.9% were 'home infections' of instructors and students, and 15.2% were cases that occurred when meeting with colleagues and acquaintances. did.
The characteristics of cases where infections from instructors to students in Cheonan City are 'large class size,' 'small space,' and 'high exercise intensity.' The humid, warm air of sports facilities, along with the turbulence created by intense exercise, is believed to have resulted in a high density of droplet infections.
Also, in the infected class, 5-22 students were doing high-intensity exercise for 50 minutes in a room within 60 square meters. No infections were seen when up to 5 students in the same class participated in the lesson. In addition, researchers did not test positive for PCR in a class that taught yoga or Pilates to 7-8 students at the same institution, so researchers with low intensity yoga and Pilates did not It is hypothesized that a class-like infection is unlikely to occur.
However, the survey could not rule out the possibility that an infected person was overlooked because the complete list of sports facilities was not available.
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