Patent ID: 7651444

Claim:
An auxiliary structure for improving fitness equipment efficacy comprising a left and a right traction bar each pivoted to a crank fixed by a sprocket axis from a stepper at a proper location where a sprocket and a resistance control wheel are disposed to a rear end of a base; a right and left swing bar each respectively pivoted to a front end of the left and the right traction bar; the swing bar is further pivoted to a support; a pair of pedals is disposed on the traction bars; and each traction bar when driven by the swing bar swinging back and forth drives the pedal to swing and travel up, down, back, and forth; a set of connection bars pivoted to each swing bar and each pedal, the set of connection bars comprise left and right push-and-pull connection bars which are respectively pivoted to one end of the left and right pedal; another end each of the left and the right push-and-pull connection bars are respectively pivoted to one end each of a left and a right transmission connection bars; another end each of the left and the right push-and-pull connection bars are respectively pivoted to one end each of a left and a right transmission connection bars; another end each of the left and the right transmission connection bars are respectively connected to the support; at both middle sections of both of the left and the right transmission connection bars are respectively pivoted to respective rear ends of left and a right active connection bars; front ends of each of the left and the right active connection bars are respectively pivoted to both of the left and the right swing bars; each traction bar disposed with a slide for the pedal to roll therein; and the pedal with a roller disposed at its bottom to roll in the slide of each traction bar; both swing bars drive both traction bars and the set of connection bars to create individual push-and-pull results on each of both pedals to increase longitudinal travel ranges of both pedals to improve exercise efficacy of twisting and treading.