OPUMP - World's First Lung / Breathing TrainerBreathing is a natural thing: breathe in, breathe out you probably dont think it very much. But there is a wrong and proper way to get oxygen into your system through your lungs. And breathing training is one of the most overlooked sports and well being areas. Like other skeletal muscles, respiratory muscles respond to stimuli overload during exercise training, thus resulting in significant increases in strength and endurance. Its the key to bringing