The Physiological Explanation
Breathing consists of a number of different muscles that work together. There is a distinction between primary and secondary breathing. Primary breathing, which is the most important one for the actual respiration and for singing and wind playing, uses the intercostal muscles (the muscles between your ribs) and the diaphragm.
For asthmatics, the breathing musculature is a scarce commodity that can profitably be trained in order to minimise the inconvenience of a reduced respiratory function. Likewise, a strong and ready breathing musculature is necessary to give of ones best as a sportsperson, singer or wind player.
The idea behind Aerofit is that the more load you put on your breathing muscles, the more powerful your breathing will be. Your inspiratory pressure – this means the pressure when you breathe in – will increase, and you will be less short of breath. This will make you capable of using your strength better. Moreover, you will discover clear improvements in the quality of your singing, as the pressure will be taken off the vocal chords. This will make them work more easily without being overworked.