Woman preparing for a jog

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Step It Up

There's so much research to suggest that an active lifestyle helps you keep strong—and youthful. One new study found that older cyclists had muscle and immune function decades younger than their actual ages. If riding isn't your thing, walk. People who boosted their weekly step count over five weeks said they felt younger than people who walked less, per a preliminary study presented at the American Psychological Association conference. Researchers have also found that people who walked faster reported feeling younger, so kick up the speed too.