The answer is simple - they used to have totally different life style!
First of all, they didn't have to choose - to eat healthy food or not. All food was organic and there was no GMO and Fast food. So, women of 20 century prepared and ate nutritious meals. They had fewer chances to gain fat than we have today.
Secondly, their life was active. And NOT because of exercising! They couldn't workout at all, but still, they were fit. There were no public technologies, no TV, no computers, no Internet, washing machines, no mobiles. Want to chat with anyone? Go and meet them! Want to find information? Search for it in libraries! Want to keep the house clean? Do every home activity with your own hands!
So, those women used to exercise less, but they had a really active lifestyle and moved a lot. Now, look at us! Sitting all day long in front of computer or Tv, with a little movement. As a result, when we don't exercise, we become a piece of jelly, even when trying to eat the right food.
So, move, ladies, move!
LOSE WEIGHT 3X MORE EFFECTIVE