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Bashir presented the results of the study this week at the annual meeting of the Radiological Society of North America in Chicago.
Comparing Sitting Positions
Back pain is one of the most common causes of work-related disability in the U.S. and helping to identify bad seating postures may help protect the spine and prevent injury.
Using "positional" magnetic resonance imaging (MRI) researchers studied the sitting positions of 22 healthy volunteers with no history of back pain. The MRI machine allowed freedom of motion, such as sitting or standing, during imaging. Conventional MRI machines require the patient to lie flat and may mask some causes of back pain.
Researchers used the MRI to examine spinal positioning while the participants assumed three different sitting positions: slouching forward (such as hunched over a desk or video game console), an upright 90-degree sitting position, and a relaxed position with the back reclined backward about 135 degrees while the feet were still on the floor.