Stepper

1. A stepper comprising:

a base having an upright post;

two axles provided on the post wherein the axles extend laterally downwards as they extend away from each other on opposite flanks of the post;

two pedals each pivotally supported on a related one of the axles so that each of the pedals is moved inward as it is moved downward and each of the pedals is moved outward as it is moved upward;

two impeding elements each provided between the base and a related one of the pedals; and

a coordinating unit comprising a lever pivotally supported on a rear portion of the post and formed with two cushioned ends each for contact with a bottom portion of a related one of the pedals so that as one of the pedals is moved upwards and outwards the other pedal is moved downwards and inwards.

2. The stepper according to claim 1 further comprising an axle for pivotally connecting the lever to the post.

3. The stepper according to claim 1 further comprising two sleeves each connected to a related one of the pedals and rotationally supported on a related one of the axles.

4. The stepper according to claim 1 , wherein each of the impeding elements is selected from a group consisting of a spring, a pneumatic cylinder and a hydraulic cylinder.

5. The stepper according to claim 1 further comprising two elastic strings connected to the base so that such a user can exercise the user's arms by pulling the elastic strings.

6. The stepper according to claim 1 , wherein each of the pedals comprises an arched portion for contact with a related one of the ends of the lever.