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Why does sitting for long periods of time increase back pain sometimes? This question has been studied for the past 50 years and researchers still find controversy when trying to answer the question. At the heart of the dilemma is a mechanical dynamic between body weight, body posture, and spinal disc load.
A loading, compressive force on a spinal disc creates a certain amount of pressure within the disc which is like a marshmallow in between two graham crackers being squished together. This pressure can be measured with special devices inserted into the disc. With various body positions like lying down, sitting, standing and bending forward, the pressure amounts vary and were first reported in the landmark study performed by Dr. Nachemson in 1981 . In this study, he found that sitting produced higher pressures in the spinal disc than standing. So, for the past thirty years, clinicians have told patients with degenerative disc related back pain to avoid prolong sitting because h...
Diseases that fall under spondyloarthritis umbrella are ankylosing spondylitis , reactive arthritis (known previously as Reiter's syndrome) psoriatic arthritis and psoriatic spondylitis, and the arthritis or spondylitis associated with the inflammatory bowel diseases, ulcerative colitis and Crohn's disease . Still other patients may develop undifferentiated spondyloarthritis. This means they have symptoms or signs of one of the illnesses above, but don't develop the full blown disease. The disease most frequently begins between ages 20 and 40, but may begin before age 10. It affects more males than females. Risk factors include a family history of ankylosing spondylitis and male gender. Symptoms of Spondyloarthris The disease starts with hip or low back pain that comes and goes and is worse at night, in the morning, or after inactivity. Back pain may begin in the sacroiliac joints (between the pelvis and the spine) and involve all or part of the spine. Pain may go aw...
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