The human body (200) the axial stress due to vibration impression section which impresses axial stress due to vibration in each bone (7) it possesses, the particular axial stress due to vibration impression section (7) from, at least longitudinal stress or is twisted and it controls the function of the destruction osteoclast the axial stress due to vibration which includes stress the human body (200) by impressing in body axial direction. Because of this, the bone which shows the decrease of the bone quantity it is rough the pore symptom way, the execution person that tries can do the prevention for the change easily.人体(200)の各骨に軸性振動応力を印加する軸性振動応力印加部(7)を有し、当該軸性振動応力印加部(7)から、少なくとも縦応力又は捩れ応力を含む軸性振動応力を人体(200)の体軸方向に印加することにより、破骨細胞の働きを抑制する。これにより、骨量の減少を示す骨粗鬆症様の変化に対する予防を実施者が手軽に行えるようにする。
