High Quality Content by WIKIPEDIA articles! An aerotrim is a gyroscope large enough to contain a human being, used for cardiovascular workout and equilibrioception (balance) training in pilots and astronauts. Aerotrims enjoyed worldwide popularity in gyms during the 1980s, but are now out of production outside of professional applications. A handful of machines are still in circulation, largely used for entertainment at fairs and events and as sci-fi showpieces in movies and television. Several companies around the world have picked up the idea and produced their own version with slight changes. One of the originals, made in Korea, can be found in Slovenia at Aerotrim Ekopool Celje.