PROBLEM TO BE SOLVED: To provide a back-and-forth muscular exercise apparatus with a caster base placed on a plastic underlay.SOLUTION: The back-and-forth muscular exercise apparatus is for a user to sit on a chair with the feet put on the caster base on the underlay to move the feet back and forth. The apparatus includes casters freely going in and out of the caster base, and the user sits on the chair to move the feet, knees and hips back and forth on the caster base.COPYRIGHT: (C)2012,JPO&INPIT【課題】プラスチックの、下た敷きの上にキャスター台を乗せ前後筋肉運動具を提供する。【解決手段】下た敷きの上にキャスター台に足を乗せ椅子に腰を掛け曲後運動を設け、キャスター台を自由に出入りするキャスターを設け、足膝腰を前後運動設け、キャスター台に足膝腰を椅子に腰を掛け前後運動を特徴とする前後筋肉運動具である。【選択図】図1
