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Don't Sit Up Straight, It's Bad For Your Back

Article Date: 28 Nov 2006 - 8:00am (PST)

It seems that sitting up straight, something many of us are taught from a very early age, is not good for your back, say researchers from Scotland and Canada. They found that sitting up straight strains your back unnecessarily. Ideally, you should lean slightly back, at an angle of about 135 degrees, they say.

The researchers, at Woodend Hospital, Aberdeen, Scotland, used a novel form of MRI (magnetic resonance imaging) on 22 healthy volunteers to identify which positions are best, and which are worst, for our backs. The Positional MRI Machine allows the patient to move around during the examination.

The volunteers were asked to sit in three different positions:

1. Slouching. The person hunches forward, with feet touching the floor.
2. Upright, at 90 degrees, with feet touching the floor.
3. Relaxed, reclined backwards at 135 degrees, with feet touching the floor.

Measurements of spinal angles, spinal disk height, and movements were taken. When undue strain is placed on a disk, it moves - often out of place. The researchers found that the upright position, at 90 degrees, caused disks to move the most, while the relaxed position (135 degrees) caused disks to move the least. In other words, the upright position is the worst for the back, while the relaxed position is the best.

Study leader, Dr. Waseem Bashir, University of Alberta Hospital, Canada, said "Sitting in a sound anatomic position is essential, since the strain put on the spine and its associated ligaments over time can lead to pain, deformity and chronic illness."

The study was presented at the Annual Meeting of the Radiological Society of North America (RSNA).

"The Way You Sit Will Never Be the Same! Alterations of Lumbosacral Curvature and Intervertebral Disc Morphology in Normal Subjects in Variable Sitting Positions Using Whole-body Positional MRI
Waseem Bashir MBChB, Tetsuya Torio MD, Francis Smith MD, Keisuke Takahashi, Malcolm Pope PhD
Click here to view abstract online

Comment by Editor of Medical News Today

Many of us spend hours each day sitting down. I am in front of a computer screen for about ten-to-twelve hours a day. This study will completely change the way I try to position myself on my chair - I used to think sitting-up straight was the best. I always walk about when I am on the phone - I have been doing this for about two years and have found that the extra body movement is not only good for my back and general health, but also for my mental well being. Every hour I force myself to get up and walk about for a few minutes, no matter how important the work at hand is.

Written by: Christian Nordqvist
Editor: Medical News Today
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Hello everyone:

I'm helping twostepsfwd out with maintaining this community. I'd like to know which syndromes/illnesses members are most concerned with. As you may have already noticed, I'm (selfishly) most interested in CFS and FM. But this is site is for everyone, so let me know what you'd like to see me research.
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