The Physiology of Sitting

The key to healthy sitting is to maintain a natural “S” shaped spinal curve. This will minimise uneven compression of the spinal discs and muscular strain whilst improving respiration and circulation. To achieve this, the operator should sit back into the Posturemax chair thereby maintaining contact with the orthopedically contoured back rest. The height of the backrest should be adjusted so that the inflatable lumbar support is positioned adjacent to the inward curve of the lower back.

The Posturemax chair features below help you to achieve these aims:

• Posturemax Synchro Plus mechanism provides a working position with the seat tilted slightly forward, helping to rotate the pelvis with a health “S” shaped curve.
• The recline function can be left unlocked in Dynamic Free Float mode allowing the chair to follow the user’s movements, improving blood circulation and preventing stresses caused by prolonged static posture. The tension of the recline can be adjusted to suit different user weights
• In addition to the synchronised seat and back recline the back angle can be set independently. This adjustment should be used sparingly as it changes the angle between the seat and back which can result in the pelvis rotating backwards.
• The sliding seat allows operators of varying height to achieve correct support behind the knees. The seat depth should be adjusted to support the thighs but not so far as to apply pressure behind the knees; this could restrict blood flow to the lower legs.
• Height adjustable arms should be used to support the arms therby helping to reduce the load on the neck and shoulders.