Human spinal cord forms S to better tolerate stress. In sitting position, shape S changes to C. When the person is bent, the abdominal muscles become weak and without exercise it can hardly hold the body in shape and form properly.
Read More »Human spinal cord forms S to better tolerate stress. In sitting position, shape S changes to C. When the person is bent, the abdominal muscles become weak and without exercise it can hardly hold the body in shape and form properly.
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