In the past, mankind had no real reason to exercise. Compared to the technology we now have, the technology they had was so primitive that the former wasn’t much help to the latter with making life easier. Although they had tools, the people of the past still had to do everything themselves—grow or obtain food, build houses or shelters, protect themselves from danger, etc. Doing these necessary activities required the people to spend a lot of energy. Doing so almost always led to backbreaking work. Thus, most of the people were able to exercise without having to consciously do so. Since there’s now almost always something available for making a piece of work easy, the energy we’re required to spend became less and less until we found ourselves at war against weight gain. Because we can carry it out ourselves with relative ease, following a female fitness model diet plan is currently the most popular way of preventing weight gain. But this doesn’t mean just carrying out such a plan will lead to success.