Cheating Father Time: 50-year-old can be every bit as fit as someone 30 years younger, but exercise is key

Who is likely to be fitter: a lazy 20-year-old or an active 50-year-old? New research from Norway provides statistical evidence that the 50-year-old can be every bit as fit as someone 30 years younger. But exercise ? how much, and how intense ? is the key, say researchers.

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