In fact, it is necessary to divide the constitution. If your meat is soft, you can have a proper abdomen every day. That's how I lost it. No diet, no exercise. Of course, skipping rope and the like is also effective. But stick to it! Especially at night, don't eat too much! Otherwise it's hard to get. If your constitution is tight, it will be more troublesome. Maybe you will build muscles! In that case, do sit-ups and control your diet! However, it is expensive for any sport to persist. Half a month is not too long. I used to do weight-loss exercises every day, and I didn't lose weight for a month! The key is to find the right method and stick to it! I wish you success in losing weight!