Use a headset or speaker phone to avoid neck and shoulder discomfort if you use a phone frequently throughout the day. A document holder should be used if documents are referred to during keying. Support your document on either side of the monitor. Sitting for long periods of time can cause increased pressure on the intervertebral discs the spongy discs between the vertebra. Sitting is also hard on the feet and legs.
Gravity tends to pool blood in the legs and feet and create a sluggish return to the heart.
When performing daily tasks, alternate between sitting and standing or take small walking breaks throughout the day. The chair back should have a lumbar support Adjust height of backrest to support the natural inward curve of the lower back. It may be useful to use a rolled towel, lumbar roll or cushion to support the low back. The angle of the back rest is subjective but the trunk and upper legs should form an angle between 90 to 115 degrees. Sit upright in the chair with the low back against the backrest and the shoulders touching the backrest.