The ETM 3.0 training mask will help develop your lungs due to air resistance during inhalation/exhalation. This is a patented simulator, with which training will become much more effective and will reduce the time to 20 minutes. Experts recommend conducting classes wearing a mask no more than 2 times a week. For the first workout, you should choose an easier mode, which can later be replaced with a more complex one or increase the time spent doing the exercises.
The device will teach you how to control your breathing in extreme conditions situations, concentrate as much as possible on achieving your goals. If used correctly, the body will gradually adapt, the lungs will begin to work more actively due to deep breaths. The effectiveness and safety of the device has been proven in practice.