1, your current body mass index needs to know your height and weight.
2. Your current basal metabolic rate needs to know your age.
3. About the calories of the food you eat every day.
Generally speaking, the treadmill can consume about 100 calories in 20 minutes and about 225 calories in 45 minutes. If you don't exceed the standard every day, you can consume about 6750 calories a month, which is about 1 kg.
Does it look disappointing? Yes, exercise is only one aspect of losing weight. If you don't control your diet, you will gradually lose weight just by exercising. Furthermore, the treadmill basically only trains the lower body and waist and abdomen, and has no effect on the upper body. It is best to train upper limbs for half an hour every day, such as dumbbells, push-ups, stretching exercises, chest enlargement exercises, etc.
My advice on diet is:
1, reduce the amount of bread, steamed bread, rice and other staple foods. At first, subtract 1/4, and then subtract 1/4 after getting used to it until it is reduced to 1/2 to 1/3 of your current amount.
2. Increase protein's intake, such as lean meat, beef, chicken, fish and eggs.
3. Eat more fresh fruits and vegetables.
Diet combined with exercise is the only way to lose weight. Wish you success!