"Users can improve breathing in just four weeks with regular use (a few minutes twice daily) with the most versatile, effective inspirator available. Each level uses resistance training to strengthen the muscles around the lungs. Wellness Lung Exerciser (green) reduces breathlessness in everyday activities. Fitness Inspiratory Muscle Trainer (blue) helps more active people improve lung capacity. Sports Performance (red) helps you push to the next level for swimming, running and endurance sports. Safe and easy to use, these handhelf devices restore and improve breathability, deeply and easily, without medications."