@junctionette I don't really think so. Covid binds to ACE-2 receptors in your lungs. When you exercise, the volume of air exchanged increases A LOT and the velocity of the air going through your mouth (and any mask in front of it) increases a ton too. That means that viruses could be expelled and inhaled much much easier. When combined with the sweat and touching of gym equipment, it's just not a good idea.