I don't think exercise alone is enough. My roommate dropped from 160 to 140. She not only exercises, but also pays attention to her diet. The main reason for losing weight is perseverance and persistence. It is a process of self-struggle. If you lose weight scientifically, it will take about 2 months. It is best not to go on a diet to lose weight, but to eat scientifically. I wish you success in losing weight.