With the increase in community cases, Many people wear masks during strenuous exercise outdoors.
Experts say: There is no evidence to show the infection in outdoor sports.
Outdoors are more ventilated and droplets are not easy to spread.
Wearing a mask may bring other risks! Experts said: “For people who have not yet detected a heart condition or have a history of heart disease, the extra stress on the cardiovascular system caused by exercise wearing a mask may lead to a heart attack.”
What constitutes strenuous exercise without wearing a mask?
Vigorous exercise includes running, jogging, cycling, static exercise and warm-up, strength and flexibility training, and brisk walking, or walking on hilly terrain!
A leisurely walk is not considered strenuous exercise, so you need to wear a mask!
However, scientists in Belgium and the Netherlands have previously pointed out that the flight distance of COVID-19 in an indoor environment is limited, so it is very effective to maintain a distance of 6 feet (about 1.8 meters) in the case of indoor inactivity. But when running, walking or biking outdoors, keeping six feet away may not do people any good.
In the side-by-side situation, if a COVID-19 carrier breathes out or even coughs or sneezes while exercising outdoors, most of the droplets will fly behind the runner instead of next to him. Those droplets will be suspended in the air.
If people are more than two meters away from the COVID-19 carrier and they just run over, they will directly hit the droplets without enough time for them to fall to the ground.
In the same situation as above, if people are not running directly behind the COVID-19 carrier, but obliquely behind and keeping social distance, it is relatively safe.
Based on the simulation data, the research team recommends:
01. People walking outdoors should keep a distance of at least 4 meters (13 feet);
02. Runners and cyclists should maintain a distance of at least 10 meters (33 feet);
03. Keep a distance of at least 20 meters (66 feet) between fast cyclists.
The researcher also emphasized that even if these "effective and safe distances" are maintained, they should avoid following people straight behind and diverge from left to right.