Assess your own workstation;
Chair – pelvis should be slightly higher than the knees. Feet must be flat on the floor (a foot rest may be required). Chair should have good lumbar support
Desk – elbows should be just over 90 degrees to the desk (slightly wider than a right angle)
Monitor – should be arms length away and eyes should naturally look at upper/middle of the screen
Peripherals – should be within convenient reach, do not over-stretch
Lighting – monitor should be 90 degrees to the window to prevent glare
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Poor posture (usually the slumped 'C' position) not only causes back, shoulder and neck pain but also puts pressure on the throat cartilage and ribs. Lack of circulation can cause venous pooling in the ankles and the heart has to work harder to pump blood around the body. Excessive sitting leads to tight back muscles & weak abdominals exacerbating bad posture by exaggerating the spine’s natural arch.
Sitting for long periods of time can increase the risk of cardiovascular disease, diabetes and many other conditions. Those who sit for more than 8 hours a day are twice as likely to have cardiovascular disease than those who sit for half that time. Even if you exercise regularly, this does not undo the damage caused by prolonged sitting. It is important to take regular breaks to stimulate the circulatory system.