Once runner rotates pedals, the magic cycle goes upward by the hydraulic system and goes down if runners don't rotate pedals under the fixed speed. One can control the speed with controlling
valve.It automatically goes down if one doesn't exercise so that it gives a motive. Compared to the bike for health, runners check out exercise amount with the lifted height. ;Ascending according
to the rotation of pedals;Automatic descending function according to pedals'movement;Indication of height;Indication of exercise amount;Balance of exercise speed