Pedal motion path adjustable elliptical trainer

A pedal motion path adjustable elliptical trainer, comprising:

• a base frame mounted on a support surface;
• a support mechanism comprising a rail holder, a support member and two sliding rails, said rail holder being pivotally mounted at said base frame, each said sliding rail comprising a pivot portion and a sliding portion, said pivot portion being axially connected to said support member;
• a rotating mechanism set comprising two cranks and two support links, said cranks being coaxially and pivotally coupled to said base frame, each said support link comprising opposing first end portion and second end portion, said first end portion being pivoted to one said crank, said second end portion being slidably coupled to one said sliding rail for moving along a closed-loop motion path;
• a linkage mechanism set comprising two handlebars respectively pivotally mounted at opposing left side and right side of said base frame and two links respectively pivotally coupled between said handlebars and the second end portions of said support links;
• a sliding mechanism mounted at said rail holder, said sliding mechanism comprising a transmission member, two follower member and a first drive source for rotating said transmission member, said transmission member comprising two first stop blocks and two second stop blocks, said follower members being respectively mounted around two opposite ends of said transmission member and movable relative to each other between one respective said first stop block and one respective said second stop block.