[project] to the burden of the excessive effort of user and exercise etc., can not use in the state of more peaceful and comfortable, and adequately muscle strength ensures, the shaping for the waist-leg pastern position that recovery effects obtains supports the exploitation of equipment as technical task. [solution], which has, opens induction portion 2 in a pair of of foot that H fonts are opened, the foot, which opens induction portion 2, has the mutual flexibly narrow feature being freely composed, such as foot is opened induction portion 2 with the posture lain on the back and is attached on the inside of huckle M1 by user, bipod is in and opens saving from damage and the neat effect of bone for muscle of feet state this posture first from femoral joint to waist itself naturally. Selection figure is Fig. 1.
