A convertible exerciser includes a post extended from a base, a pair of cranks rotatably attached to the base, a pair of handles rotatably attached to the post of the base, a pair of levers slidably engaged on the free end portions of the cranks and each having a front portion pivotally coupled to the...http://www.google.com/patents/US7121984?utm_source=gb-gplus-sharePatent US7121984 - Convertible stepping exerciser
