1.Alternative steel:the hanged weight is made of hard steel,at the easy-reaching height and easy to adjust.

2.Frame embellishing:unique two-double baking varnishing makes the machine noble as a car,at the same time,embellishing can prevent the bike from scrapping and paint-falling.

3.Cushion:make the user in a comfortble protector,prevent user from hurting and also support the user.

4.Introduction card:sit down on the nature,lay on the backcushion, hold the handle,adduct your legs forcefully, then come back slowly to the original place,and repeat the action.

5.muscle exercised:medialis vastus,sartorius.