An exercise apparatus may include a swivel and one or more elongated members, such as ropes or cords, suspended from the swivel with a support, such as a bar, for the user suspended between either ends of a single elongated member, or between two elongated members. The height of the support can be adjusted...http://www.google.fr/patents/US7909748?utm_source=gb-gplus-shareBrevet US7909748 - Exercise apparatus
