Abstract: An exercising device is disclosed. The exercising device includes a roller device, having an axis, for rolling along a first direction from a start point, a first variation point, a second variation point to a stop point and along a second direction from the stop point, the second variation point, the first variation point, to the start point; an axle device for passing therethrough the axis; a first energy-storing device, connected to the roller device, for storing energy when the roller device rolls from the first variation point to the stop point and for releasing energy when the roller device rolls from the stop point to the first variation point; and a second energy-storing device, connected to the roller device, for storing energy when the roller device rolls from the second variation point to the stop point and for releasing energy when the roller device rolls from the stop point to the second variation point.

Abstract: An exerciser includes a lower stationary support frame having an upright shaft fixed thereto. A stepper mechanism includes a base body mounted rotatably on the shaft and having a front portion and a rear portion, a pair of spaced pedal arms, each of which having a front end pivoted to the front portion and a rear end portion extending from the front end toward the rear portion, and a pair of resistance cylinders, each of which interconnecting the rear end portion of a respective one of pedal arms and the base body. A horizontal plate member is mounted to the shaft above the base body and has two opposite spaced rear portions on two sides of the shaft. A locking unit is provided to lock releasably the plate member on the shaft so as to prevent movement of the plate member relative to the stationary support frame.