If you keep the same diet standard as before, then at this time, you should make the calories consumed by running and daily life greater than the calories of the food you eat, so as to lose weight. Under normal circumstances, running at a speed of 7 kilometers per hour every day will change. I personally tried it, but I'm not sure everyone does. After all, everyone's physique is different. I only lost a pound or two in a week.
If you eat too much before running, I think you may gain weight but not lose weight under normal circumstances. Take an actual data as an example. I ate for half a year and ran for almost an hour every day. As a result, I gained ten pounds, which was really depressing.
If you want to lose a lot of weight, I think you should pay attention to what you eat, otherwise you won't lose weight. In fact, as long as you burn calories, you will lose weight. After all, you can't lose weight at once, and there will be changes every day, but this change is subtle and not easy to find.
If you want to lose ten pounds, it is ok to control your diet for a month and ensure a certain amount of exercise every day. I have a friend. She skipped dinner and lost 20 pounds after running for a month, but her weight base was already very large. If you are thin, you may not lose that much, but you may reach a balance and your weight will not change much.
In a word, there are many possible situations. Why don't you try it yourself? It's not the way to think like this all the time, but it's better to put it into practice. Even if you can't lose weight, your posture will be much better.