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 1. Field of the Invention
 The present invention relates to an oval track exerciser, and more particularly, to a device which provides a more comfortable exercise and a proper exercise resistance. Meanwhile, the exercise slope can be changed at any time to enhance the exercise fun.
 2. Description of the Prior Art
 All of the conventional oval track exercisers make use of a circular rotating disk which is operated in combination with the treading movement of a crank and a swing arm. This is disclosed by the U.S. Pat. No. 5,759,136, named by “Exerciser having movable foot supports”. It's apparent from
 Moreover, the arrangement position and angle of both tread rod of this prior art are fixed so that the exercising slope can't be achieved.
 It is a primary object of the present invention to remove the above-mentioned drawbacks and to provide an oval track exerciser through which an exercising dead angle can be eliminated while a crank is utilized in combination with its upward and downward movement for achieving the expected oval exercising track. Moreover, the exercising smoothness can be effectively improved.
 It is another object of the present invention to provide an oval track exerciser through which the exercising slope is changeable to simulate a real exercise environment and to enhance the exercising fun.
 The accomplishment of this and other objects of the invention will become apparent from the following description and its accompanying drawings of which:
 First of all, referring to
 Furthermore, an end support
 In order to smooth the sliding motion of the moving connecting rod
 Also, a lifting device like a pneumatic cylinder, a hydraulic cylinder or a spring (not shown) can be fitted to the bottom of the rail
 Many changes and modifications in the above-described embodiments of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claim.