An exercise device includes a pair of foot engaging links (30a, 30b). The rearward ends of the foot links are supported for arcuate motion about a pivot axis (26), and the forward ends of the foot links travel back and forth along a guide (36). The combination of these two foot link motions permits the...http://www.google.es/patents/US6146313?utm_source=gb-gplus-sharePatente US6146313 - Cross training exercise device
