Common sense led us to believe that humans were programmed to be as physically active as they can and that the more exercise we do, the more calories we burn.

But from an evolutionary standpoint – these ideas are just myths. Dr Daniel Lieberman, author of 'Exercised', and Dr Herman Pontzer, author of 'Burn', explain why.

Video Journalists: Izabela Cardoso & Fernando Teixeira
Executive Producer: Griesham Taan

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