How to stay fit, looking good and living longer

Ever wondered how Jennifer Lopez looks the same she did 20 years ago?

Fitness expert Jillian Michaels has... so she took a scientific look at how anyone can look and feel younger.

"It's not just about being fit and looking good," she said.

"It's about living longer with energy and vitality which intersects with being fit and looking good."

Doctors have found six things that can affect age... find out more in our video (above).

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