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Are aching knees and a stiff back the automatic results of aging? Sure, your body changes as you get older, but that doesn't mean you have to accept symptoms such as pain. It also doesn't mean that you're destined to get the diseases and conditions often associated with older age. Here's a quiz to help you sort out what's considered normal aging, what may be a sign or symptom of something else, and how to stay healthy as you age.