PROBLEM TO BE SOLVED: To provide a compact back muscle stretcher allowing anyone regardless of age or sex to safely use it without using an engine or damaging the backbone, and making anyone feel comfortable.SOLUTION: The safe and effective back muscle stretcher is formed by making a recessed cut (2) at a central part of a circular-cylindrical roller (1), and drawing a center line thereon. The roller is placed on a flat floor surface, with the center line matching a joint of the flat floor surface. A user lies on the back, places his/her backbone on the recessed part, and vertically moves the body with the roller, so that both of the stretcher and the user move to stretch the backbone.COPYRIGHT: (C)2016,JPO&INPIT【課題】 老若男女万人が、動力を使わずに、背骨を傷めることなく安全に使用出来、かつ快適になるコンパクトな背筋伸ばし器を提供する。【解決手段】 円柱形のローラー(1)の中央部分に凹型の切り込み(2)を造り、中心線を描き、平らな床面の継ぎ目に中心線を合わせ、仰向けになって、背骨を凹部に載せて ローラーと共に身体を上下移動する事による器具と人間が両方動いて背筋を伸ばす事を特徴とする。【選択図】図1
