A signal processing part (18) has a calculation section (181) which calculates the center point of the user's left foot by use of the detection results obtained by respective weight sensors (160, 161) for the left foot and calculates the center point of the user's right foot by use of the detection results obtained by respective weight sensors (170, 171) for the right foot. A judgment section (183) measures the displacement of the center point calculated by the calculation section (181) with respect to the center point of the ideal characteristic of the storage section (182) by each foot of the user. When the displacement is smaller than apreset threshold (5% of a distance from the origin to the center point of the ideal characteristic) in both of the right foot and the left foot, the judgment section (183) judges the action to be normal. When the displacement is not smaller than the threshold in at least the right or left foot, the judgment section (183) judges the action to be abnormal. A control section (180) stops a driving device (50) when the frequency of displacement not smaller than the threshold per a fixed period becomes not smaller than a preset frequency. This trains user's muscles effectively.一種被動運動設備，係於訊號處理部的計算部，利用左腳載重感應器的檢測結果計算使用者左腳的中心點，利用右腳載重感應器的檢測結果計算使用者右腳的中心點。判定部就使用者每隻腳，測量計算部所算出的中心點相對於記憶部理想特性的中心點之變位。當左右腳的前述變位小於預設閾值(其值為原點至理想特性中心點的距離的5%)時，判定部即判斷正常動作。另一方面，當左右腳至少任一者之前述變位在閾值以上時，判定部即判斷異常動作。控制部係當每一預定時間的變位在閾值以上的次數，達到預設次數以上時，即令驅動裝置停止。藉此有效鍛鍊使用者的肌肉。
