A device for strengthening the back and upper body as well as decompressing the spine is adaptive to various seated positions and methods of manipulation. The device comprises a stabilizing base, and upper crossbar joined by a central resistance member such as a spring bar extending therebetween. A gripping member such as a first and second grip or handle placed on either side of the resistance member extend from the cross bar to transfer restoring forces stored in the resistance member upward from beneath a user's armpit or shoulder joint in a manner that passively stretches the spine upward. The device is optionally operative to enable isometric as well as dynamic exercises without requiring alteration of the device itself.
