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 Occupational Safety and Health
 General Controls
 Good Working Positions
 Monitors
 Keyboards
 Pointer/Mouse
 Wrist/Palm Supports
 Document Holders
 Desks
 Chairs
 Telephones
 Awkward Postures
 Contact Stress
 Force
 Repetition
 Musculoskeletal Disorders
 Work Process and Recognition
 Workstation Environment
 Introduction to OSHA
 Occupational Safety and Health Summary
 Safety & Health Management Systems
 Helpful Statistics
 Costs of Accidents
 Safety & Health Integration
 Safety & Health Culture
 Safety & Health System Components
 Management Leadership and Employee Involvement
 Worksite Analysis
 Hazard Prevention and Control
 Safety & Health Training
 Obstacles to a Successful Safety and Health Program
 Strategic Map
 Management Processes
 OSHA Help for New Businesses

 

 

Contact Stress
Contact stress can occur either internally or externally. Internal stress occurs when a tendon, nerve, or blood vessel is stretched or bent around a bone or tendon. External contact stress occurs when part of your body rubs against a component of the workstation, such as the chair seat pan or edge of the desk. Nerves may be irritated or blood vessels constricted as a result.
  • You can experience contact stress to your forearms when you rest them on the leading edges of work tables or, if the nerves in the forearm are affected, your fingers and hands may tingle and feel numb, similar to the feeling when you hit your "funny bone".
  • You may experience pain and numbness in your legs if blood circulation is cut off by contact with the leading edge of a chair.
  • Your forearms and wrists can be affected if wrist rests have sharp, hard leading edges.
  • Tendons can be damaged when repetitive finger motion tasks are performed with a bent wrist.

To help solve these problems carefully select wrist rests, chairs, and desk surfaces and take frequent rest and stretch breaks to minimize the amount of contact stress that you may experience. Adjust your workstation to maintain neutral wrist postures.

 
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