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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 ...
The office chair sits at 25 inches wide, 24 inches deep and an adjustable height of 38 to 42 inches. It has a weight capacity of 275 pounds, and a high-density foam seat cushion, so it doesn’t ...
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.
In neurology, Lhermitte phenomenon, also called the barber chair phenomenon, is an uncomfortable "electrical" sensation that runs down the back and into the limbs. The sensation can feel like it goes up or down the spine. It is painful for some, although others might simply feel strange sensations.
Back pain is present in 29% of patients with systemic cancer. [19] Unlike other causes of back pain that commonly affect the lumbar spine, the thoracic spine is most commonly affected. [19] The pain can be associated with systemic symptoms such as weight loss, chills, fever, nausea and vomiting. [19]
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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.
The lumbar spine is often the site of back pain. The area is susceptible because of its flexibility and the amount of body weight it regularly bears. [2] It is estimated that low-back pain may affect as much as 80 to 90 percent of the general population in the United States. [3]