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| P | | | Passive Adjustment:
Device that changes the geometry of a chair that is unconsciously manipulated by the sitter. For example, reclining in a chair passively adjusts the seat angle. An example of a more sophisticated passive adjustment is the way lumbar support automatically increases as the sitter reclines. The advantage of passive adjustment is that they allow unselfconscious sitting," providing the support the sitter needs without requiring the conscious effort of a manual or active adjustment.Personal protective equipment(PPE):
Gloves, kneepads and other equipment that may help reduce hazards until other controls can be implemented, or to supplement existing controls. Pivot Point:
Literally, a shaft or pin on which something revolves. A pivot point can also be imaginary; a football pivots about an invisible line drawn from nose to nose as it is thrown through the air. Popliteal Height:
Distance from the floor to the crease right behind the knee. One of the anthropometric measurements used for determining seat height.Postural Stasis:
Condition where a single body position is held for long periods of time. The health risks of postural stasis include restricted blood circulation, fewer nutrients to the intervertebral discs, and atrophy of muscle tissue.Posterior Alignment:
Semi-reclined posture often preferred by VDT workers, similar to that assumed by automobile drivers. Thighs are horizontal and the back is reclined about 10 degrees from vertical. | | |
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