Figure 1

The "Bartzokas' maneuver". Top: while seated, 'sucks in' the abdomen and simultaneously presses his abdomen with his hands. Middle: elevation; the alignment of the spinal column is characteristic, especially of the lumbar segment. Below: completion of the elevation to standing position, with alignment of the femurs and knees. During the whole elevation the spinal column is 'maintained' still and aligned. (Photo: Konstantinos Chatzinikolaou).