If you google: " Does getting to breathlessness with exercising help get mucus up and out of the lungs" it might help with what you want to know.
I believe it is the cardio that they are referring to, reaching a point of breathlessness.
Dr. Ann Elizabeth O'Donnell from Georgetown a BE, Bronchiectasis specialist, in a video spoke of wearing a weighted down backpack when walking to get to a point of breathlessness.
Hope all you are seeing here is giving you ideas and answers.
Lovely, skating. Now that takes much determination and perseverance in itself.
Wishing you beautiful toe jumps and bunny hops.
Barbara