Patent ID: 7563211

Claim:
A multi-function exercise apparatus comprising: a support platform; a pair of footboards with two respective pedals attached to said support platform; a sliding seat assembly having a seat cushion fastened to a sliding section, and said sliding section slidingly mounted to said support platform, said sliding section provides with a sliding base mounted on said support platform and a fastening section disposed on said base which includes two separate protrusions extending from both sides of said base and a pivotal socket connected to an outer edge of each said protrusion; two spring devices respectively secured to both sides of said sliding seat assembly and each of which comprising a spring, a first stem affixed to a top end of said spring and a second stem attached to a lower end thereof; said second stem connected to said sliding seat assembly; said spring device is installed to said pivotal socket; and a seat back pivoted to said two first stems of said spring devices to bend said spring while imparting a supine force to said seat back, by which a resistant force can be generated against said supine force further wherein each said protrusion has a pivotal plate disposed thereon and said seat back has two respective braces fastened to bottoms of said two arms; each said brace forms a slot at its distal end so as to contact with said pivotal plate.