Elevation masks were developed to simulate breathing at altitude, by restricting the amount of oxygen that you receive whilst training. The thinking is that this restriction will make your heart and lungs work harder, training your body to adapt to a reduced oxygen intake. 

POWERbreathe IMT exercises your inspiratory muscles, mainly your diaphragm and intercostals,  using the most widely studied and applied methods of breathing training. POWERbreathe inspiratory muscle training uses a form of resistance training to generate a ‘load’ that you breathe in against. Breathing in against this adjustable, variable load increases your breathing strength and stamina and reduces breathing fatigue. Training and strengthening your breathing muscles with POWERbreathe IMT is good preparation for breathing at altitude, as it helps you to make the most of the limited oxygen at higher elevations.
Watch our video explaining POWERbreathe IMT