Some interesting smoking questions have led me to ask this. I am myself a recovering tobacco addict - I stopped a few months ago. Though my health has improved vastly, I still can easily get wheezing / shortness of breath in anxious or physical situations.
Some research has led to believe I have undiagnosed asthma, which is triggered by smoking. Regardless, I want to ask if there's any forms of strengthening air intake/ lung function and what is the science behind it?
For instance, its uncontroversial that cardiovascular exercise helps. But exactly by doing what? What about breathing excercises? Diet? What else can be done?