| 摘要 |
In accordance with this invention, a back strengthening device is provided which includes a horizontal bar, a support for the horizontal bar and a foot platform which can be raised or lowered. Apparatus is provided on the horizontal bar to sense the application of hand grasping forces on the bar while the foot platform is provided with structure to sense weight being applied to the top surface of the platform. When the person desires to use the device, he grasps the horizontal bar to actuate the apparatus thereon while he is standing on the platform. These actions cause the platform to be lowered to a point just below contact with the feet or in mild contact with the feet as the force exerted on the platform is reduced while it is lowered away from contact with the weight of the user. The user then can hang from the horizontal bar so that all or substantially all of his weight is hanging free, thereby to stretch the back muscles. Upon completion of the exercise, the user releases the horizontal bar so that the feet contact the closely positioned platform with little or no force being exerted on the user thereby.
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