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If you've ever had pain that just wouldn't go away, you're not alone. Many people think pain always means something is badly damaged. But that isn't always true. Pain is your body's alarm system. Like a smoke alarm, it is meant to protect you. Sometimes that alarm works perfectly. Other times, it becomes extra sensitive and goes off even when there isn't a real danger. Think about a paper cut. It can hurt a lot even though the injury is very small. Now think about a bruise yo

Regular physical exercise plays in preserving cognition and promoting brain health across the aging process. Epidemiological studies...