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Before chairs with a back and arm rests debuted as a status symbol among ancient Egyptians about 5,000 years ago, he says that humans mostly kneeled or squatted for about 2 million years ...
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The kneeling chair is meant to reduce lower back strain [5] by dividing the burden of one's weight between the shins and the buttocks. People with coccyx or tailbone pain resulting from significant numbers of hours in a sitting position (e.g., office desk jobs) are common candidates for such chairs.
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Back pain (Latin: dorsalgia) is pain felt in the back. It may be classified as neck pain (cervical), middle back pain (thoracic), lower back pain (lumbar) or coccydynia (tailbone or sacral pain) based on the segment affected. [1] The lumbar area is the most common area affected. [2]
An office chair, or desk chair, is a type of chair that is designed for use at a desk in an office. It is usually a swivel chair , with a set of wheels for mobility and adjustable height. Modern office chairs typically use a single, distinctive load bearing leg (often called a gas lift ), which is positioned underneath the chair seat.
Two actions are performed while doing hyperextensions on a Roman chair. The body is bent forward at the hips, lowering the body towards the floor. The body is then lifted to straighten the back again, to return to the start position and complete one repetition (see animation, above).
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