Why stop manual and easy to get fat after exercise

First of all, would like to stress that rather than engage in manual labor movement and easily lead to fat people. Caused by this type of fat personnel reasons, mainly because eating habits have not changed their work with the change. Just imagine the heavy physical demand and athletes Meidun 0.5 kg appetite and habit of a few hundred yuan a month of food standards, if not as physical activity and reduce the decrease in fat who can not do?