Continuous standing or sitting while working is a common source of discomfort and fatigue. Frequent changes of body positions, including alternating between sitting and standing, helps to avoid fatigue.

• Adjust the workstation to the proper height. Refer to the document Working in a Standing Position for more information.
• Use a swivel chair with an adjustable seat height.
• Adjust the chair seat height to 25-35 cm (about 10 - 14 in.) below the work surface.
• Use a footrest with a height of 40-50 cm (about 16 - 20 in.).

• Arrange work in a semi-circle.
• Use a swivel chair to reduce body twisting, to allow easy movements, and to reduce side-to-side motions.
• Use sloping work tables whenever possible to reduce bending, and to encourage an upright position while sitting or standing.

Whenever possible, a worker should be able to work sitting or standing at will.

• Ensure that the seat has a minimum width of 40 cm (about 16 in.).
• Choose back rests that are contoured vertically and horizontally.
• Use a seat covering of non-slip, breathable fabric.
• Select seat padding that is about 2-3 cm (1 in.) thick.

• Provide a chair that can fold up and be stored out of the way where space is limited.
• Ensure that chairs have a back support.
• Provide a chair for resting purposes even when work can only be done standing.