A lumbar support device and a selective stabilization support device for use in treating mechanical lower back pain. The lumbar support device includes a semi-rigid member for positioning around the user's abdomen. The semi-rigid member helps to prevent excessive trunk bending by the patient. At least one and preferably two tensioning straps are also provided connectable at first and second end regions to a surface of the semi-rigid member. The strap or straps are provided to encircle the user's torso to maintain the lumbar support device in position. An adjustable attachment means, for example in the form of a clip, is attached to the straps. The adjustable attachment means is movable laterally along the strap. A pad base is provided on the adjustable attachment means, the pad base being movable with the adjustable attachment means such that its position at the lumbar region of the patient can be varied.