The GYROTONIC EXPANSION SYSTEM® is a unique form of exercise devised by Hungarian, Julio Horvath, in the 1970s. It is based on his explorations of yoga, t'ai chi, dance and swimming following a bad injury which halted his career in classical dance. The principles of the technique include revitalising the body's energies by allowing three-dimensional movement to follow natural energy lines, or meridiens, to release blockages and stimulate the nervous system. Sequences of undulating exercises take the spine through all ranges of motion to free the joints and strengthen the musculature. Unique equipment, designed by Julio to support the technique, provides variably controlled resistance a little akin to working underwater. Improved posture and alignment are all found by emphasising motion, rhythm and flow.