I don't think that this method is practical. You need to eat a lot of food to get 59 kg of body fat. It's easier to conserve that food and just eat it at winter

I don't think that this method is practical. You need to eat a lot of food to get 59 kg of body fat. It's easier to conserve that food and just eat it at winter. Food conservation was practically a solved problem for a long time, you just have to get that food in the first place. Those who die because of starvation usually did not have enough food to begin with (because of bad harvest, for example).