Mild lumbar Lordosis / Kyphosis: Tightening the internal straps will increase the convex curvature to suit different degrees of lumbar Lordosis while loosening them will reduce or even eliminate the curvature to suit a lumbar kyphosis.

Ideally, the backrest should be positioned vertically so that the second strap from the bottom will support the pelvis at a level just below the Ischial crest. <<<back