After a Planet Fitness client in West Virginia tested positive for COVID-19, health officials advised 200 people who could have been exposed to the virus to stay home under quarantine. The Monongalia Health Department issued a statement urging anyone who was in the gym June 24 between the hours of 9 a.m. ET to 3 p.m. ET to stay home for 14 days after being potentially exposed.

According to CNN, the location temporarily closed "out of an abundance of caution and in the interest of the community" to allow for a thorough cleaning. The Planet Fitness corporate office said it was not aware of any other members or employees reporting symptoms and added the company would continue to "take every necessary precaution to ensure the safety of the community."

Gyms have been placed on high-risk lists by infectious disease experts.

According to the HuffPost, Dr. Kelly Cawcutt, the associate director of infection control and assistant professor of infectious disease and critical care medicine at University of Nebraska Medical center, said she was concerned about crowded classes or gyms where the air flow is poor.

"Exercise increases the frequency and depth of breathing, so there is potential impact of increased aerosols at this time," she told HuffPost.

Aerosols are the small particles people exhale when breathe or talk that could contain the virus.

"Masks would be ideal, but we also know those can be difficult to wear during exercise and may not be mandated," she added to HuffPost.