I really observed it with weighing scale. I can weigh about 20 Jin in winter than in summer. Analysis of the main reasons, first of all, the basic metabolism of the human body is slow in winter and fast in summer, which is also in line with the phenomenon of human storage in spring and summer. If you eat the same diet, you will definitely gain weight. Secondly, the clothes I wear in summer are vests and underwear, and the down jacket in winter must be 7-8 kg to keep warm. In addition, I usually like to gain muscle in winter and lose fat in summer, so my weight will naturally be lighter than that in winter 10 kg.