Wearing your mask below your nose is funnily ridiculous and unsafe. If you're breathing through your nose and only covering your mouth, you're effectively lessening the purpose of the mask. Putting on and wearing a mask right requires covering both your nose and mouth at the very least. When it comes to this, it is always safe to put on a mask that covers your entire face.
Studies reveal that wearing a correct cloth mask or surgical mask while exercising doesn’t impact the flow of oxygen or carbonic acid gas in any way. If you have got serious heart and lung problems, then that isn’t an excuse to not wear a mask. It is imperative that you wear your masks correctly so as to avoid infecting or spreading other people.