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Sit relaxed if you can to prevent lumbago and other back problems.
To avoid backproblems caused by increased pressure, load and muscle tension, it is important to sit leaning backwards, with the back supported, not slouching. The healthiest sitting position for the back has, in medical studies, been found to be with a backward inclination of 110-130 degrees between trunk and legs. As Spina-Bac is rigid and adjustable, you can angle it in any inclination, making it possible to “taylor-make” your own chair. With the help of Spina-Bac you can create your own ergonomic and reclining chair.
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