Chairs

• Considerable time spent sitting adds strain to the spine. Ergonomic chairs are designed for good posture by lending support to the lower back. Adjustable seat heights allow arms to be at desk level with thighs horizontal and feet flatly on the floor. The back rest gives support to the spine, particularly the lumbar region of the lower back. Arm rests add comfort and allows for relaxed shoulders, while a swivel permits easy, strain-free movement.
  
  

Wrist Rests

• Wrist rests are also called palm rests. Their main function is to prevent hands from falling off the keyboard edge, as awkward wrist positioning is the main cause of carpal tunnel syndrome. Wrist rests also removes extra weight on the back and shoulders thus reducing spinal pressure. As they are intended for use as a rest between typing, hands should be removed during keyboard use to avoid overstretching the wrist and fingers.
  
  

Keyboards

• The split-key model of an ergonomic keyboard.Stockbyte/Stockbyte/Getty Images
  
  Ergonomic keyboards help improve hand and wrist posture during typing. A common keyboard design is the curved model, which is angled to promote a more natural posture and is recommended for ergonomic beginners. The split-key model separates at various points of the keyboard and is designed for advanced users or individuals with serious symptoms of repetitive strain injury. Ergonomic keyboards are usually complimented with an ergonomic mouse, although techniques are developed to use a normal mouse ergonomically.
  
  

Desks

• Desks were the first products designed for office ergonomics and are used in combination with other products for a complete ergonomic program. It allows for the organization of all computer equipment to achieve optimum user comfort. Monitors should be positioned directly in front of users at a comfortable distance to avoid unnecessary neck movements and eye strain. The area under the desk must be clear to allow sufficient leg space for stretching.