Except for our athletes, since we are much, much less
active than our hunter - gathering ancestors, it doesn't take an Einstein to figure out that that is part of the explanation for the obesity epidemic.
For instance, sleeping less
than six hours per night may increase appetite, as some studies suggest, but a sleep - deprived office worker surrounded by fast - food joints is more likely to become obese
than a physically
active hunter - gatherer faced with a limited food supply.