Scientifically proven to strengthen your respiratory muscles, the POWERbreathe Medic Plus can be used by a wide range of patients to reduce breathlessness, improve exercise tolerance and enhance quality of life. You will notice that you have to work harder to breathe in when training with your POWERbreathe Medic Plus. This is the effect of resistance training acting on the inspiratory muscles, primarily the diaphragm and rib cage muscles, used when you inhale. When breathing out, there is no resistance and you can breathe out normally, allowing your chest and breathing muscles to relax, naturally pushing the air from your lungs. When used correctly, as detailed in your user manual, you should begin to enjoy the benefits of using your POWERbreathe Medic Plus in just a few weeks