Which is one way that a person with asthma can maintain a healthy respiratory system

The best way to control asthma and maintain a healthy respiratory system is to avoid asthma triggers.

Asthma triggers cause inflammation and bronchoconstriction of the lungs. Examples of asthma triggers are dust mites, tobacco smoke, and pet dander.

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.