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You probably take your back for granted -- until it starts to hurt. Think about it -- your back is a part of your body that's in nearly constant use. Whether you're sitting, standing or moving, your back and its muscles are providing support all day, every day. Test your knowledge of the back by taking this quiz.
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What's the most sensitive part of your body? Are women less sensitve to pain than men? Does everyone feel pain? Get answers to these questions and more by taking the pain quiz.
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