From your article (emphasis mine):
"Researchers asked healthy, active people to perform cycling exercises until exhaustion on three occasions."
I can't seem to see where they tested people with asthma or COPD. Perhaps you can point that out for me. That is after all the argument that was being made.
newsGP - Face masks may increase feelings of breathlessness – but do not affect gas exchange
REPUBLISHED: They might sometimes feel ‘suffocating’, but recent research found masks do not affect oxygen or carbon dioxide levels.
www1.racgp.org.au
Here you go