Here is a clever tool designed to make your lungs stronger and help you improve your cough flow, dyspnea, and lung performance. The Breather Pink is an inspiratory and expiratory muscles trainer. It is designed to improve oxygen saturation, reduce breathlessness & hyperinflation, and increase athletic performance.
The Breather Pink Lung Trainer comes with 5 expiratory and 6 inspiratory pressure settings. You can find out more about it here.