I have been exercising for two or three months every day, and I also run every day. My diet is well controlled. Why did I gain three kilograms?
Running every day has a certain effect on losing weight, but it depends on the length of time you run. If you just run for ten or twenty minutes every day, you can't burn fat. Although you control your diet, if you eat high-calorie food and exercise consumes less calories than you do, then you will gain weight instead of losing weight.