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From
gmb
Our backs are amazing, complex structures.
The spine alone houses the spinal cord and nerves that control our every movement and process the sensations that allow us to connect with the world around us. It’s also part of a system that both absorbs and distributes force, such as lifting and carrying loads through our shoulders and arms, while our legs move us around.
In order to accomplish the many tasks it’s supposed to, the back has to be flexible enough to move in every direction, while remaining rigid enough to transfer heavy loads through our arms and legs, whether we are sitting, standing, or lying down.
