the seat is made from foam then continuous use can cause it to become deformed and then it will not provide cushioned support. Insufficient cushioning and inappropriate contouring can cause discomfort and hip and back fatigue. Is the tilt of the seat adjustable? In some situations it can be helpful to change the tilt of the seat pan to help to maintain a healthy seated posture. Does the chair have a 5-pedestal base? The chair should have at least a 5-pedestal base with casters that glide freely over the floor surface. You may also want to choose a chair that swivels easily. Do you need armrests on your chair? If so, are the armrests broad, cushioned and comfortable? While sitting can you adjust the height of the armrests and can you move the armrests closer together or further apart?
             In the ideal typing posture both static and dynamic muscle loads are minimized. This posture is achieved when the keyboard is below seated elbow height and the keyboard base is gently sloped away from the user so that the key tops are accessible to the hands in a neutral posture. In this position the arms, shoulders, neck and back can relax, especially during brief rest pauses. Also, in this slightly reclined sitting position the low back rests against the lumbar support of the chair, the elbow angle is opened to promote circulation to the lower arm and hand, the abdominal angle, and the popliteal angle (behind the knees) are opened to promote blood circulation. The feet rest firmly upon the floor.
             Optical glass glare filters on computer monitors can reduce health and vision problems related to computer glare and help boost productivity in computer users, according to a new Cornell University study. After using a glass anti-glare filter, the percentage of problems related to tiredness, trouble focusing eyes, itching/watery eyes and dry eyes was half what they were before filter use. This was true for people, who use computer monitors all day at work...