Running can certainly lose weight. When to run is up to you. First of all, you should have enough exercise every day, at least one hour, to make yourself sweat. Of course, running is definitely the first choice. Work hard. Second, control diet. Quantify every meal every day. For example, one bowl per meal is reduced to half a bowl. Everything happens for a reason. There must be a lot of problems with your diet. It is caused by overeating. So you should exercise hard under strict diet control, which will get twice the result with half the effort.