One and a half hours ~ enough time, but with a certain intensity, feel the body. I mean, the amount of exercise should not be too small. It's useless to do any exercise lightly.

Thin waist aerobics, its own function is to exercise the waist, abdomen and stomach. As long as you persist, you will definitely lose weight.

Try not to go on a diet, just eat less than usual, one day you are not fat, one day you are not thin, don't eat vegetables, and you can't be partial to food because you lose weight. Otherwise, when you lose excess fat, someone will say that you are malnourished.

As long as you insist on weighing every half month, it will give you a surprise. I used to be fat. Last year I had more than 190. I used to run for half an hour every day to lose weight. Take your time. This year I am 154. I didn't go on a diet much, because I didn't think it was useful. Eat less this meal, and eat more when you are hungry. Even if you can persist, it will be harmful to your health.

Do exercise well, as long as you can persist. Wish you success!