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

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.