Elliptical machine for strengthening leg exercise

An elliptical machine for strengthening and exercising legs comprises a base, two connecting rod assemblies and two grab rails, a base rod and two vertical rods are arranged on the base, the two vertical rods are located on the rear side of the base rod, a first shaft rod is transversely and fixedly connected to the tops of the two vertical rods, a connecting rod is arranged between the first shaft rod and the upper portion of the base rod, and the first shaft rod is connected with the connecting rod. A second shaft rod is transversely and fixedly connected to the connecting rod, a stand column is connected to the top of the base rod, a third shaft rod is transversely and fixedly connected to the lower portion of the stand column, a belt wheel is arranged on the right side of the base rod, a rotating shaft penetrates through the upper portion of the base rod and penetrates through the belt wheel, and cranks are connected to the left end and the right end of the rotating shaft correspondingly; one side surface