You'd better not lose weight with the belief of reducing it to 120. It's not impossible, but too much pressure is not good. One of my classmates is very fat. He decided to lose weight because his girlfriend from other places gave him a pair of trousers. But his pants are only a little thinner, so his goal is very low. Pants are easy to repair. Slowly, he found that the method was very effective, so he decided to stick to it and lost more than 20 kilograms.