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sixpenceee:

Have you ever wondered why an ice pack relieves pain? Why should cold make the pain go away? 

It works because a cold object activates fast fibers in your spinal cord, while pain travels up to your brain in slow fibers. So when you press a cold pack against a sore muscle your fast fibers beat out the slow ones. You feel cold not pain. 

Source: The Body Has A Mind Of Its Own by Sandra & Matthew Blackeslee

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