David Hariton:
Most of us carry genes that direct our bodies to stay thin as long as we’re active, but store extra fat on our bodies as long as we’re sedentary.

David Hariton, author of the book, Survival of the Thinnest…

Our genes did not evolve in the last hundred years while we all had office jobs. They evolved over the last several million years while our species were hunter-gathers. And what human beings did to survive is they were long distance walkers. They were the species that walked on two legs and spotted distance food resources and coordinated to run after it. They were the species that was able to avoid predators. Of all those things, people had to be thin. They could not afford to store extra fat on their body.

So, millions of years of evolution dictate that in order to stay thin you have to stay active, but you’ve got to find the time.

You know the time is not hard to find if you don’t make a federal case out of it. It’s so important not to exercise by driving half an hour to a gym and changing your clothes and waiting for a machine. It’s a three-hour federal case because nobody can sustain that. It’s gotta be something you do - you roll out of bed, before you take a shower, you get your exercise out of your way, and you move on. And I can tell you it’s a lot easier than going on diets especially when the diets don’t work.