Who knew that sitting up straight isn't the best posture for your back? No wonder low back pain is one of the most common medical complaints. Apparently, Scottish radiologists have concluded that a 130-degree angle of recline between your thighs and back is the best position to relieve strain on your lumbar vertebrae. Via Popular Science.

I was broken my spine for 16 years ago,and seat on the office chair my spine painful all time, Please tall me where can I buy this chair,and How much the price?
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