Aerofit is a Danish-developed training system that was formerly developed for medical use for patients with lung problems, for example, Asthma and bronchitis. Aerofit is made for specific training of the diaphragm and the muscles between the rib cage (the intercostal muscles). The primary idea behind the product is to attain a more powerful breathing by gradually applying your respiratory system with increased workload. Aerofit has shown to be much more effective for other target groups than originally thought. This means that Aerofit is very effective for athletes who wish to increase their endurance and respiratory strength. Moreover, Aerofit has shown to be effective for singers and musicians using wind instruments. These two target groups don’t just get an increased respiratory strength and endurance, but also a significantly increased coordination ability that almost immediately gives a better tone and quality of sound.