If you walk fast for an hour every day (as you said, 60-80 minutes in seven kilometers, just walk at the slowest pace per kilometer 1 1 minute), your diet will decrease and your weight will drop. I walked six kilometers this morning. Weighing 69 kg before walking and 68.5 kg after walking. I must have consumed body fat after eliminating the water lost by sweating. So, if your weight doesn't change much, it's mainly because your diet is not in place. Eat slowly until you are full (referring to brunch), and the food should be diverse and balanced. Don't stare at staple food and meat, eat more vegetables. Dinner is three points full, and the staple food is about one or two. You have to adjust the amount of meals for three meals to one hour before you feel hungry. If you are hungry, do some small exercise, and the weight loss effect will be better.