An exercise machine for low impact exercise of a person. The machine has a base and a support post extending from the rearward end of the base. Two leg members divergently extend generally downward from a first forward facing pivot point for pivoting about a first axis perpendicular to the support post....http://www.google.fr/patents/US6220990?utm_source=gb-gplus-shareBrevet US6220990 - Jumping jack exercise machine
