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Forget about muscle mass as you age, focus on strength

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When it comes to longevity, bigger is not always better.

When it comes to longevity, bigger is not always better.

ILLUSTRATION: JACKSON GIBBS/NYTIMES

Hilary Achauer

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NEW YORK – These days, you might think you have to become a powerlifter to age well.

Dr Gabrielle Lyon, a celebrity physician, calls muscles the organ of longevity. For Dr Peter Attia, they are the most important retirement accounts you can have.

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