An improved travel guiding structure (1) of an exercise apparatus for leg sports having a driving wheel (11) and a resistance control mechanism (2) for controlling the rotation resistance of the driving wheel, comprises two draw-bars (114), with one end of each drawbar being pivoted with a driving base (113), at a front end of which a sleeve (1130) is arranged for sheathing a drive shaft (111) of a rotary crank (112) of the driving wheel, with the other end of each draw-bar being pivoted with a guide roller socket (115) with a guide roller (1151) arranged inside, and a footplate (1141) being positioned on each draw-bar; and a guide (3), wherein, two guide rails (31) extend outwards from two points with a predetermined space on the base (10) of the exercise apparatus respectively, and two ends of the guide rails are interconnected to form a reinforcement section (32), so that a V-shaped, triangular or parallel guide is formed to be used for the guide rollers in the guide roller sockets to be straddled thereupon.