Armrests support the lower arms and help to sit ergonomically. They can be adjustable in four ways: in height, depth, width and angle (radially adjustable). These should be adjusted so that you can roll close enough to the desk. The forearms should rest loosely with a right angle between the upper and lower arms.
Armrests should match and be set at the same height as the table surface. The table must be adjusted to the office chair, not vice versa. Height-adjustable tables are particularly ergonomic tables.
Height adjustment of the armrest
Adjust the armrests so that there is a right angle between the lower and upper arm and the shoulder and neck muscles are in a relaxed state. Please make sure that your elbows rest on the armrests. This will relieve your shoulder muscles. The length of your upper arm determines the height of the armrest.
Width adjustment of the armrests
You can support your neck and shoulder muscles while working by adjusting the width of the armrests. Make sure that the arms are rather close to the body. A distinction is made here between armrests that are fully adjustable in width and armrests with soft pad supports that are adjustable in width.